This bug has been copied from bug #581897 and has been proposed to be backported to 5.5 z-stream (EUS).
Built xorg-x11-drv-i810-1.6.5-9.36.el5_5.1 MODIFIED
As this bug was reopened, the requested flags seem wrong. Now requesting rhel‑5.8.0 and also left a comment in Bug 581897.