http://blogs.msdn.com/gregmcb/archive/2008/03/03/index-grows-out-of-control.aspxI have seen on two ocassions where the index entries in MSSCrawlURL table grew from 39K to 13 million entries. While I have not figured out the root cuase, the workaround is to just rebuild your index.en-USCommunityServer 2.1 SP1 (Build: 61025.2)