Today my index server started to show this error in the event logs:
Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
More or less the same error in three separate events:
Event ID 6398
Event ID 6482
Event ID 7076
I did a quick search on the web and found this fix: http://support.microsoft.com/default.aspx/kb/946517
Seems to work but I'm still not sure why this started to happen all of a sudden.
My environment: Server 2003 SP2, MOSS SP1, Feb CU