I think I've seen this a while back.The issue is likely caused by a corrupt full-text catalog. Disabling and re-enabling event full-text indexing via Maintenance-Database Maintenance should do the trick.
I've run into this a while back, BULK INSERT operations failing with no apparent reason.Reapplying the latest SQL Server service pack and/or the latest MDAC (on the MC system) resolved the problem. I would start with the MDAC refresh, it may be enoug...