With last graphics drivers from Git-da7029d on ATI RV530 (X1700) all the 3D
applications with "radeon: Acquired Hyper-Z", as Second Life, Racer, Quake III
demo have blank screen and in their respective logs these lines appear:
...
radeon: The kernel rejected CS, see dmesg for more information.
radeon: The kernel rejected CS, see dmesg for more information.
radeon: The kernel rejected CS, see dmesg for more information.

With dmesg command I obtain:

[ 3637.361007] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
[ 3637.361220] Forbidden register 0x4F54 in cs at 36 (val=00000500)
[ 3637.361223] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
[ 3637.406861] Forbidden register 0x4F54 in cs at 683 (val=00000500)
[ 3637.406871] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !
[ 3637.407391] Forbidden register 0x4F54 in cs at 36 (val=00000500)
[ 3637.407397] [drm:radeon_cs_ib_chunk] *ERROR* Invalid command stream !