Konqueror krashing on amd64

[Tilman Linneweh]

Hi,

Anybody running KDE on amd64-CURRENT?
Somewhere in the last three months something broke. Today I finally 
recompiled kdelibs with DEBUG support.

Several applications start to crash on startup, like konqueror, kmix, kate 
and others still run fine, like konsole or kicker.

The BT looks like this:

Program received signal SIGSEGV, Segmentation fault.
0x0000000202883b39 in QString::fromUtf8 () from /usr/X11R6/lib/libqt-mt.so.3
(gdb) bt
#0  0x0000000202883b39 in QString::fromUtf8 ()
   from /usr/X11R6/lib/libqt-mt.so.3
#1  0x00000002018ea580 in KXMLGUIFactory::readConfigFile (filename=@0xacf0b0,
    never_null=false, _instance=0xffffffffffff9fff) at kxmlguifactory.cpp:127
#2  0x00000002018ea30d in KXMLGUIFactory::readConfigFile (filename=@0xad0000,
    instance=0xffffffffffff9fff) at kxmlguifactory.cpp:99
#3  0x00000002018e7748 in KXMLGUIClient::findMostRecentXMLFile (
    files=@0x7fffffffdd20, doc=@0x7fffffffdd60) at kxmlguiclient.cpp:630
#4  0x00000002018e5dfb in KXMLGUIClient::setXMLFile (this=0x8d97a0,
    _file=@0x7fffffffde10, merge=false, setXMLDoc=16) at kxmlguiclient.cpp:183
[...]

Any ideas?

regards
tilman