Comment 21 for bug 401045

I have the same problem but I have Nvidia graphic card.
It happens working with QTCreator 1.2.1 opening a *.ui file after a full project recompilation.
My system is a fresh Ubuntu 9.10, graphic driver Nvidia 190 (but also happens with 185)

A piece of my /var/log/Xorg.0.log.old :

Backtrace:
0: /usr/bin/X(xorg_backtrace+0x3b) [0x8133d6b]
1: /usr/bin/X(xf86SigHandler+0x55) [0x80c7d35]
2: [0xa79400]
3: /usr/bin/X(FindGlyphByHash+0x3c) [0x816e71c]
4: /usr/bin/X [0x817b13c]
5: /usr/bin/X [0x81742e5]
6: /usr/bin/X(Dispatch+0x35f) [0x808d17f]
7: /usr/bin/X(main+0x395) [0x8072515]
8: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe6) [0x24db56]
9: /usr/bin/X [0x80719c1]
Saw signal 11. Server aborting.