I know that the solution from EMC is to downgrade below 6.2.229. Just wanted to chime in I'm experiencing the same syndrome to:
2 G5 XServes running Tiger
at least 2 Leopard/Intel clients.
The backup server is running on Windows and is Vers 7.6x.
Of course, please reply back when you have fixed this issue, EMC. Thanks!
P.S. Also, you might want to take down the "upgrade" link on 6.2.229 until this issue goes away.