I've fixed the gaim crash in CVS. 
 
Not sure about the problem with aMule.  I can't test it here, because it 
refuses to compile, and I can't find a binary package that works :P  I'll test 
it later. 

With Fedora Core 3 using the same software, Gaim, and OpenOffice freeze/crash
when bringing up the "save as" window, before the window is displayed.

I think bugs 2831 and 3393 depends (or are duplicates of) this bug.

I can get both (almost 100% of the time) Firefox 1.0.6 and Thunderbird 1.0.6 to
crash if I switch to a virtual desktop which does not contain those applications
and klick on something in the kicker (e.g. application buttons or the K-menu) in
KDE 3.4 and GTK/QT 0.6 and Baghira 0.6e.

But I can safely use kicker (click on buttons, using the K-menu, ...) without
Firefox or Thunderbird crashing if I access it on the same virtual desktop
Firefox runs.

When Firefox/Thunderbird crash they spew out messages like this in
$HOME/.xsession-errors

QObject::disconnect: Unexpected null parameter
QObject::connect: Cannot connect (null)::hide() to Baghira::DeMaximizer::hide()
QObject::disconnect: Unexpected null parameter
QObject::connect: Cannot connect (null)::hide() to Baghira::DeMaximizer::hide()
QObject::disconnect: Unexpected null parameter
QObject::connect: Cannot connect (null)::hide() to Baghira::DeMaximizer::hide()
No running windows found
QObject::disconnect: Unexpected null parameter
QObject::connect: Cannot connect (null)::hide() to Baghira::DeMaximizer::hide()

(Gecko:8408): Gdk-CRITICAL **: gdk_pixbuf_get_from_drawable: assertion
`gdk_window_is_viewable (src)' failed

(Gecko:8408): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_n_channels: assertion
`pixbuf != NULL' failed

--- 8< many Gdk-errors removed 8< ---

(Gecko:8408): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_height: assertion `pixbuf !=
NULL' failed

(Gecko:8408): GdkPixbuf-CRITICAL **: gdk_pixbuf_get_rowstride: assertion `pixbuf
!= NULL' failed

(Gecko:8408): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT
(object)' failed
/usr/libexec/mozilla-launcher: line 116:  8408 Segmentation fault      "$mozbin"
"$@"
firefox-bin exited with non-zero status (139)

I'm seeing firefox/gimp crashes w/ gtk-qt-engine (cvs build) + baghira-0.71 (see
https://bugs.freedesktop.org/show_bug.cgi?id=3393#c1)

I'm using gtk-qt-engine-0.6cvs20050709 and baghira 0.7 In this  
configuration I have some serious problems, not as many as before, but still 
enough. So here's what I discovered sofar: 
 
with eclipse it's the following methods which cause a crash of the 
application:  
  
C  [libgdk-x11-2.0.so.0+0x54c2b]  gdk_window_set_back_pixmap+0x11b  
  
C  [libgdk-x11-2.0.so.0+0x16355]  gdk_drawable_get_colormap+0x25  
  
Then with gimp, I have observed those error messages:  
  
(gimp-2.3:23888): Gdk-CRITICAL **: gdk_drawable_get_colormap: assertion  
`GDK_IS_DRAWABLE (drawable)' failed  
  
(gimp-2.3:23888): Gdk-CRITICAL **: gdk_drawable_set_colormap: assertion  
`GDK_IS_DRAWABLE (drawable)' failed  
  
(gimp-2.3:23888): Gdk-CRITICAL **: gdk_drawable_get_depth: assertion  
`GDK_IS_DRAWABLE (drawable)' failed  
  
(gimp-2.3:23888): Gdk-CRITICAL **: gdk_window_set_back_pixmap: assertion  
`pixmap == NULL || gdk_drawable_get_depth (window) == gdk_drawable_get_depth  
(pixmap)' failed 
 
and as far as I see it, all (ok, maybe not) gtk applications have a problem 
with unreferencing a GObject 
 
 (firefox-bin:24962): GLib-GObject-CRITICAL **: g_object_unref: assertion 
`G_IS_OBJECT (object)' failed 
 
I really hope, I could help in some way 

Closing this because it works for me, and has probably been fixed in a later
version.

If the problem persists with a fresh SVN checkout, please open a new bug in the
new bugtracker:
http://gtk-qt.ecs.soton.ac.uk/bugs.php

Thanks!