Bubble3d screensaver sometimes causes hang of Xorg. Killing of screensaver does not help.

X.Org X Server 1.6.5
Release Date: 2009-10-11

(II) Loading /usr/lib/xorg/modules//drivers/radeon_drv.so
(II) Module radeon: vendor="X.Org Foundation"
        compiled for 1.6.5, module version = 6.12.4

(--) RADEON(0): Chipset: "ATI Radeon 9250 5960 (AGP)" (ChipID = 0x5960)

openSUSE 11.2 i586
xf86-video-ati-6.12.4
linux-2.6.31

Here is a backtrace:

#0  SmartScheduleTimer (sig=14) at utils.c:1243
#1  <signal handler called>
#2  0xffffe430 in __kernel_vsyscall ()
#3  0xb73f9039 in ioctl () from /lib/libc.so.6
#4  0xb71acd8e in drmIoctl (fd=10, request=25668, arg=0x0) at xf86drm.c:188
#5  0xb71ad191 in drmCommandNone (fd=10, drmCommandIndex=4) at xf86drm.c:2344
#6  0xb7128791 in RADEONWaitForIdleCP (pScrn=0x8237a20) at radeon_commonfuncs.c:722
#7  0xb6ed8fc5 in XAAPolyFillRectPixmap (pDraw=0x8a2cb70, pGC=0x892a848, nrectFill=1, prectInit=0x8638234) at xaaGC.c:522
#8  0xb6f21301 in cwPolyFillRect (pDst=0x8a2cb70, pGC=0x892a848, nrects=1, pRects=0x8638234) at cw_ops.c:345
#9  0x081874bb in damagePolyFillRect (pDrawable=0x8a2cb70, pGC=0x892a848, nRects=1, pRects=0x8638234) at damage.c:1404
#10 0x0808b064 in ProcPolyFillRectangle (client=0x82410d8) at dispatch.c:1789
#11 0x0808dccf in Dispatch () at dispatch.c:456
#12 0x08071f85 in main (argc=9, argv=0xbfcaa1e4, envp=0xbfcaa20c) at main.c:397