Mac: How can I have Adium reindex the chat logs for searching through the Chat Transcript Viewer window?

Hi,

In Adium, When I go to the Chat Transcript Viewer window to search for stuff in the chat logs, it not always finds what I want.

Is there an index file that I can delete to have it reindex the logs? Or does it use spotlight in the underpinnings?

Where would said file be?