DRM Impacted by Recent Changes

[vehemens]

I'm no longer able to compile a local version of MESA DRM that doesn't cause 
system hangs with a current snapshot of 06/21/07.   The same code worked when 
used with a current snapshot of 06/09/07.  The DRM binaries compiled from the 
06/09/07 snapshot also work with the 06/21/07 snapshot.

Nothing jumped out at me when I looked at the snapshot diffs.

I just downgraded my system back to the 06/09/07 snapshot and everything works 
again.

Does anyone have suggestions on what may be the cause before I start 
incrementing my way back to a 06/21/07 snapshot?