These error message often appear in the log.
2009-10-10 07:13:11 Full Text message: Memory allocation error. errcode = 6338
2009-10-10 07:13:11 Error full text indexing document NT0004CAEA F:\Data\Mail\mfaltstr.ft (rc=3892) Not enough memory for Full Text Indexing or Search
2009-10-10 07:13:21 Full Text message: Memory allocation error. errcode = 6338
2009-10-10 07:13:21 Error full text indexing document NT0000F492 F:\Data\mtdata\mtstore.ft (rc=3892) Not enough memory for Full Text Indexing or Search
Any ideas?