Why Does Safari 3.1.2 Trigger mds?

Greeting forum members! I cannot understand why safari makes mds/spotlight go crazy? Could it be bookmark indexing? It's the most aggravating thing to have your CPU tied up by mds going bonkers at 95-100%. I do have quite a few bookmarks. But this makes no sense whatsoever!? Is there anything I can do about this? Takes 10-20 minutes to get it to settle down from mds taking over my cpu. When I check things in Activity Monitor and double click on safari and get the Open Files and Port report, here's what I find at the end of the list everytime:
/Users/donniedixon/Library/Safari/HistoryIndex.sk
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/Resources/tokrule BE.data
/dev/random

Thank you for listening!