xfig + compiz crash X server

Binary package hint: nvidia-glx-new

On an up-to date (8.04 Hardy) Kubuntu machine with compiz running, xfig popping up a menu causes the X server to crash with the following log:

Backtrace:
0: /usr/bin/X11/X(xf86SigHandler+0x7e) [0x80c780e]
1: [0xb7fbb420]
2: /usr/lib/xorg/modules//libfb.so(fbCopyWindowProc+0x149) [0xb6e7c9a9]
3: /usr/lib/xorg/modules//libfb.so(fbSaveAreas+0x7a) [0xb6e724ca]
4: /usr/lib/xorg/modules/drivers//nvidia_drv.so [0xb6f5c26f]

Fatal server error:
Caught signal 11. Server aborting

It is not completely deterministic, sometimes xfig's menus work fine, but in general it is enough to work on it for several minutes to experience a crash.
The problem does not occur with kwin window manager, so I guess it is nvidia/compiz related.
This bug might be actually related to #226683 (judging by the syslog similarities), but I did not experience any instability apart from the above mentioned xfig issue.

Relevant installed packages:

xfig 1:3.2.5-rel-2ubuntu1
compiz-kde 1:0.7.4-0ubuntu6
xserver-xorg 1:7.3+10ubuntu10
linux-image-2.6.24-18-generic 2.6.24-18.32
linux-restricted-modules-2.6.24 2.6.24.13-18.41
nvidia-glx-new 169.12+2.6.24.13-18.41
nvidia-glx-new-dev 169.12+2.6.24.13-18.41

Graphics card:

01:00.0 VGA compatible controller [0300]: nVidia Corporation NV43 [GeForce 6600 LE] [10de:00f4] (rev a2)

syslog:

Jun 5 11:45:30 atenea kernel: [ 8698.869208] NVRM: Xid (0001:00): 40
Jun 5 12:16:55 atenea kernel: [10579.815178] Xorg[13019]: segfault at 000001a4 eip 0818fa3a esp bff2b6a0 error 4
Jun 5 12:16:55 atenea console-kit-daemon[6454]: WARNING: Unable to activate console: No such device or address