[CentOS] ATI Radeon 2600HD + CentOS 5.1 x86_64 = Deadlock

Anyone on the list using an ATI Radeon 2600HD on a x86_64 machine?  I 
have 3 new Dell Precision T3400 workstations with them in it and the 
moment it tries to fire up X using the proprietory driver it completely 
deadlocks.  I'm looking for help from the community to track this problem.

http://ati.cchtml.com/show_bug.cgi?id=941