BizTalk 2004 SP2 - BRE (Business Rule Engine) Fixes
https://support.microsoft.com/kb/905290/
Fix 245451: BRE caches XML fields incorrectly
https://support.microsoft.com/kb/905571/
Fix: 245450: The Rule Engine is not honoring rule priorities correctly in high load
https://support.microsoft.com/kb/920136/
FIX: Some Business Rule Engine values in the Windows registry are reset to the default values in BizTalk Server 2004
For all the bugs fixed in BTS 2004 SP2, see