Description of problem:
After upgrading a system equipped with an "Intel Corporation 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device rev 3", desktop cannot be enabled anymore. Running 'env LIBGL_DEBUG=verbose glxgears' returns

  "libGL: OpenDriver: trying /usr/lib/dri/i915_dri.so
   libGL error: dlopen /usr/lib/dri/i915_dri.so failed
        (/usr/lib/dri/i915_dri.so: undefined symbol: drm_intel_bo_busy)
   libGL error: unable to load driver: i915_dri.so
   libGL error: driver pointer missing"

Version-Release number of selected component (if applicable):
mesa-libGL-7.6-0.10.fc12.i686

How reproducible:
Always.

Steps to Reproduce:
1. Try to enable desktop effects from within a GNOME session.
  
Actual results:
Error message appears reporting
  "Accelerated 3D graphics is not available
   Desktop effects require hardware 3D support."

Expected results:
Desktop effects get enabled.

Additional info:
- Used to work for the previous version of mesa-libGL.
- Installed packages include:
  * kernel-PAE-2.6.31-0.213.rc9.git1.fc12.i686
  * libdrm-2.4.12-0.9.fc12.i686
  * xorg-x11-drv-intel-2.8.0-12.20090908.fc12.i686
  * xorg-x11-server-Xorg-1.6.99.900-1.fc12.i686