Hello,
There also was an error with the agents on Windows 2003, i believe it was the 9.10 version see : http://h30499.www3.hp.com/t5/ITRC-HP-Systems-Insight-Manager/Event-ID-1182-Foundation-Agent-A-Change-in-the-health-status-of/td-p/5691751
I've also edited the MIB file on the SIM server to stop handeling the event. Logon to SIm go to Options> Events > SNMP Trap Settings Select the cpqhost.mib from the first entry the select the trapname : cpqHoMibHealthStatusArrayChangeTrap en set the Enable Trap Handling to No.
Don't forget that every time you update the Mibs these settings get overwritten, this happens on software updates and hotfixes. Both contain MIB updates.