For people running ForeFront Security for Exchange SP2, Rollup 2 was released.

The related knowledgebase article kb2270641 mentions the following additional fixes:

1. The FSCTransportScanner.exe process in Forefront Server Security for Exchange may stop responding, and this generates a Dr. Watson crash that references Bucket ID 1211603866
2. The FSECCRService.exe process in Forefront Server Security for Exchange may stop responding, and this generates a Dr. Watson crash that references Bucket ID 1076269539
3. Forefront Server Security for Exchange fails to write a crypto checkpoint in the RSA\Machine Keys folder
4. The FSCController.exe process in Forefront Server Security for Exchange may stop responding, and this generates a Dr. Watson crash that references Bucket ID 1229588505
5. The Forefront Security for Exchange GetEngineFile process crashes and Forefront is unable to perform a scan engine update
6. Kaspersky scan engine in Forefront Security for Exchange does not update on a CCR cluster
7. Forefront Security for Exchange does not install on Windows Server 2008 R2
8. Forefront Security for Exchange now supports the Kaspersky 8 engine

For more details, consult the KB article. You can download FSE SP2 RU2 after submitting a hotfix request here.