diff --git a/client.h b/client.h
index b18b62e357..b671d09bac 100644
--- a/client.h
+++ b/client.h
@@ -344,7 +344,7 @@ private slots:
         QString readName() const;
         void setCaption( const QString& s, bool force = false );
         bool hasTransientInternal( const Client* c, bool indirect, ConstClientList& set ) const;
-        void setupWindowRules();
+        void setupWindowRules( bool ignore_temporary );
         void updateWindowRules();
         void finishWindowRules();
 
diff --git a/manage.cpp b/manage.cpp
index d24b902160..209a9a5856 100644
--- a/manage.cpp
+++ b/manage.cpp
@@ -111,7 +111,7 @@ bool Client::manage( Window w, bool isMapped )
     // and only then really set the caption using setCaption(), which checks for duplicates etc.
     // and also relies on rules already existing
     cap_normal = readName();
-    setupWindowRules();
+    setupWindowRules( false );
     setCaption( cap_normal, true );
 
     detectNoBorder();
@@ -482,6 +482,9 @@ bool Client::manage( Window w, bool isMapped )
     delete session;
 
     ungrabXServer();
+    
+    if( client_rules->discardTemporary( true ))
+        setupWindowRules( true );
 
     return true;
     }
diff --git a/rules.cpp b/rules.cpp
index e04b2c60e3..3182adb3bf 100644
--- a/rules.cpp
+++ b/rules.cpp
@@ -12,6 +12,9 @@ License. See the file "COPYING" for the exact licensing terms.
 
 #include <kconfig.h>
 #include <qregexp.h>
+#include <ktempfile.h>
+#include <ksimpleconfig.h>
+#include <qfile.h>
 
 #include "client.h"
 #include "workspace.h"
@@ -22,7 +25,8 @@ namespace KWinInternal
 static WindowRules dummyRules; // dummy used to avoid NULL checks
 
 WindowRules::WindowRules()
-    : wmclassregexp( false )
+    : temporary_state( 0 )
+    , wmclassregexp( false )
     , wmclasscomplete( false )
     , windowroleregexp( false )
     , titleregexp( false )
@@ -53,6 +57,22 @@ WindowRules::WindowRules()
     {
     }
 
+WindowRules::WindowRules( const QString& str, bool temporary )
+    : temporary_state( temporary ? 2 : 0 )
+    {
+    KTempFile file;
+    QFile* f = file.file();
+    if( f != NULL )
+        {
+        QCString s = str.utf8();
+        f->writeBlock( s.data(), s.length());
+        }
+    file.close();
+    KSimpleConfig cfg( file.name());
+    readFromCfg( cfg );
+    file.unlink();
+    }
+
 #define READ_MATCH_STRING( var, func ) \
     var = cfg.readEntry( #var ) func; \
     var##regexp = cfg.readBoolEntry( #var "regexp" );
@@ -70,6 +90,12 @@ WindowRules::WindowRules()
     var##rule = readForceRule( cfg, #var "rule" );
 
 WindowRules::WindowRules( KConfig& cfg )
+    : temporary_state( 0 )
+    {
+    readFromCfg( cfg );
+    }
+
+void WindowRules::readFromCfg( KConfig& cfg )
     {
     wmclass = cfg.readEntry( "wmclass" ).lower().latin1();
     wmclassregexp = cfg.readBoolEntry( "wmclassregexp" );
@@ -107,7 +133,7 @@ WindowRules::WindowRules( KConfig& cfg )
     READ_FORCE_RULE( acceptfocus, Bool, );
     READ_FORCE_RULE( moveresizemode, , Options::stringToMoveResizeMode );
     READ_FORCE_RULE( closeable, Bool, );
-    kdDebug() << "READ RULE:" << wmclass << endl;
+    kdDebug() << "READ RULE:" << wmclass << "/" << title << endl;
     }
 
 #undef READ_MATCH_STRING
@@ -212,29 +238,31 @@ bool WindowRules::match( const Client* c ) const
     {
     if( types != NET::AllTypesMask )
         {
-        if( !NET::typeMatchesMask( c->windowType( true ), types )) // direct
+        NET::WindowType t = c->windowType( true ); // direct type
+        if( t == NET::Unknown )
+            t = NET::Normal; // NET::Unknown->NET::Normal is only here for matching
+        if( !NET::typeMatchesMask( t, types ))
             return false;
         }
-    // TODO exactMatch() for regexp?
     if( !wmclass.isEmpty())
         { // TODO optimize?
         QCString cwmclass = wmclasscomplete
             ? c->resourceName() + ' ' + c->resourceClass() : c->resourceClass();
-        if( wmclassregexp && !QRegExp( wmclass ).exactMatch( cwmclass ))
+        if( wmclassregexp && QRegExp( wmclass ).search( cwmclass ) == -1 )
             return false;
         if( !wmclassregexp && wmclass != cwmclass )
             return false;
         }
     if( !windowrole.isEmpty())
         {
-        if( windowroleregexp && !QRegExp( windowrole ).exactMatch( c->windowRole()))
+        if( windowroleregexp && QRegExp( windowrole ).search( c->windowRole()) == -1 )
             return false;
         if( !windowroleregexp && windowrole != c->windowRole())
             return false;
         }
     if( !title.isEmpty())
         {
-        if( titleregexp && !QRegExp( title ).exactMatch( c->caption( false )))
+        if( titleregexp && QRegExp( title ).search( c->caption( false )) == -1 )
             return false;
         if( !titleregexp && title != c->caption( false ))
             return false;
@@ -243,8 +271,8 @@ bool WindowRules::match( const Client* c ) const
     if( !clientmachine.isEmpty())
         {
         if( clientmachineregexp
-            && !QRegExp( clientmachine ).exactMatch( c->wmClientMachine( true ))
-            && !QRegExp( clientmachine ).exactMatch( c->wmClientMachine( false )))
+            && QRegExp( clientmachine ).search( c->wmClientMachine( true )) == -1
+            && QRegExp( clientmachine ).search( c->wmClientMachine( false )) == -1 )
             return false;
         if( !clientmachineregexp
             && clientmachine != c->wmClientMachine( true )
@@ -404,11 +432,29 @@ bool WindowRules::checkCloseable( bool closeable ) const
     return checkForceRule( closeablerule ) ? this->closeable : closeable;
     }
 
+bool WindowRules::isTemporary() const
+    {
+    return temporary_state > 0;
+    }
+
+bool WindowRules::discardTemporary( bool force )
+    {
+    if( temporary_state == 0 ) // not temporary
+        return false;
+    if( force || --temporary_state == 0 ) // too old
+        {
+        kdDebug() << "DISCARD:" << wmclass << "/" << title << endl;
+        delete this;
+        return true;
+        }
+    return false;
+    }
+
 // Client
 
-void Client::setupWindowRules()
+void Client::setupWindowRules( bool ignore_temporary )
     {
-    client_rules = workspace()->findWindowRules( this );
+    client_rules = workspace()->findWindowRules( this, ignore_temporary );
     // check only after getting the rules, because there may be a rule forcing window type
     if( isTopMenu()) // TODO cannot have restrictions
         client_rules = &dummyRules;
@@ -427,17 +473,22 @@ void Client::finishWindowRules()
 
 // Workspace
 
-WindowRules* Workspace::findWindowRules( const Client* c ) const
+WindowRules* Workspace::findWindowRules( const Client* c, bool ignore_temporary )
     {
     for( QValueList< WindowRules* >::ConstIterator it = windowRules.begin();
          it != windowRules.end();
          ++it )
         {
-        // chaining for wildcard matches
+        if( ignore_temporary && (*it)->isTemporary())
+            continue;
+        // TODO chaining for wildcard matches
         if( (*it)->match( c ))
             {
             kdDebug() << "RULE FOUND:" << c << endl;
-            return *it;
+            WindowRules* ret = *it;
+            if( ret->isTemporary())
+                windowRules.remove( *it );
+            return ret;
             }
         }
     kdDebug() << "RULE DUMMY:" << c << endl;
@@ -478,11 +529,49 @@ void Workspace::writeWindowRules()
     int i = 1;
     for( QValueList< WindowRules* >::ConstIterator it = windowRules.begin();
          it != windowRules.end();
-         ++it, ++i )
+         ++it )
         {
+        if( (*it)->isTemporary())
+            continue;
         cfg.setGroup( QString::number( i ));
         (*it)->write( cfg );
+        ++i;
         }
     }
 
+void Workspace::gotTemporaryRulesMessage( const QString& message )
+    {
+    bool was_temporary = false;
+    for( QValueList< WindowRules* >::ConstIterator it = windowRules.begin();
+         it != windowRules.end();
+         ++it )
+        if( (*it)->isTemporary())
+            was_temporary = true;
+    WindowRules* rule = new WindowRules( message, true );
+    windowRules.prepend( rule ); // highest priority first
+    if( !was_temporary )
+        QTimer::singleShot( 60000, this, SLOT( cleanupTemporaryRules()));
+    }
+
+void Workspace::cleanupTemporaryRules()
+    {
+    kdDebug() << "CLEANUP" << endl;
+    bool has_temporary = false;
+    for( QValueList< WindowRules* >::Iterator it = windowRules.begin();
+         it != windowRules.end();
+         )
+        {
+        if( (*it)->discardTemporary( false ))
+            it = windowRules.remove( it );
+        else
+            {
+            if( (*it)->isTemporary())
+                has_temporary = true;
+            ++it;
+            }
+        }
+    if( has_temporary )
+        QTimer::singleShot( 60000, this, SLOT( cleanupTemporaryRules()));
+    }
+
 } // namespace
diff --git a/rules.h b/rules.h
index 8194a3c063..e81f753316 100644
--- a/rules.h
+++ b/rules.h
@@ -42,8 +42,11 @@ class WindowRules
     public:
         WindowRules();
         WindowRules( KConfig& );
+        WindowRules( const QString&, bool temporary );
         void write( KConfig& ) const;
         void update( Client* );
+        bool isTemporary() const;
+        bool discardTemporary( bool force ); // removes if temporary and forced or too old
         bool match( const Client* c ) const;
         Placement::Policy checkPlacement( Placement::Policy placement ) const;
         QRect checkGeometry( const QRect& rect, bool init = false ) const;
@@ -68,11 +71,13 @@ class WindowRules
         Options::MoveResizeMode checkMoveResizeMode( Options::MoveResizeMode mode ) const;
         bool checkCloseable( bool closeable ) const;
     private:
+        void readFromCfg( KConfig& cfg );
         static SettingRule readRule( KConfig&, const QString& key );
         static SettingRule readForceRule( KConfig&, const QString& key );
         static NET::WindowType readType( KConfig&, const QString& key );
         static bool checkRule( SettingRule rule, bool init );
         static bool checkForceRule( SettingRule rule );
+        int temporary_state; // e.g. for kstart
         QCString wmclass;
         bool wmclassregexp;
         bool wmclasscomplete;
diff --git a/workspace.cpp b/workspace.cpp
index 2dd47e145d..4e4c15caf9 100644
--- a/workspace.cpp
+++ b/workspace.cpp
@@ -66,6 +66,7 @@ Workspace::Workspace( bool restore )
     number_of_desktops(0),
     popup_client      (0),
     desktop_widget    (0),
+    temporaryRulesMessages( "_KDE_NET_WM_TEMPORARY_RULES", NULL, false ),
     active_client     (0),
     last_active_client     (0),
     most_recently_raised (0),
@@ -109,6 +110,9 @@ Workspace::Workspace( bool restore )
     installed_colormap = default_colormap;
     session.setAutoDelete( TRUE );
 
+    connect( &temporaryRulesMessages, SIGNAL( gotMessage( const QString& )),
+        this, SLOT( gotTemporaryRulesMessage( const QString& )));
+
     updateXTime(); // needed for proper initialization of user_time in Client ctor
 
     delayFocusTimer = 0; 
@@ -247,6 +251,7 @@ void Workspace::init()
         NET::WM2RestackWindow |
         NET::WM2MoveResizeWindow |
         NET::WM2ExtendedStrut |
+        NET::WM2KDETemporaryRules |
         0
         ,
         NET::ActionMove |
diff --git a/workspace.h b/workspace.h
index 2e3e713b9f..ec2bd2e6a0 100644
--- a/workspace.h
+++ b/workspace.h
@@ -16,6 +16,7 @@ License. See the file "COPYING" for the exact licensing terms.
 #include <kshortcut.h>
 #include <qcursor.h>
 #include <netwm.h>
+#include <kxmessages.h>
 
 #include "KWinInterface.h"
 #include "utils.h"
@@ -202,7 +203,7 @@ class Workspace : public QObject, public KWinInterface, public KDecorationDefine
         void storeSession( KConfig* config, SMSavePhase phase );
 
         SessionInfo* takeSessionInfo( Client* );
-        WindowRules* findWindowRules( const Client* ) const;
+        WindowRules* findWindowRules( const Client*, bool );
 
     // dcop interface
         void cascadeDesktop();
@@ -330,6 +331,8 @@ class Workspace : public QObject, public KWinInterface, public KDecorationDefine
         void lostTopMenuSelection();
         void lostTopMenuOwner();
         void delayFocus();
+        void gotTemporaryRulesMessage( const QString& );
+        void cleanupTemporaryRules();
 
     protected:
         bool keyPressMouseEmulation( XKeyEvent& ev );
@@ -431,6 +434,7 @@ class Workspace : public QObject, public KWinInterface, public KDecorationDefine
 
         QPtrList<SessionInfo> session;
         QValueList<WindowRules*> windowRules;
+        KXMessages temporaryRulesMessages;
         static const char* windowTypeToTxt( NET::WindowType type );
         static NET::WindowType txtToWindowType( const char* txt );
         static bool sessionInfoWindowTypeMatch( Client* c, SessionInfo* info );