Its been, um, awhile now so I'm afraid I can't quite recall.
Are members actually able to delete their own posts? I don't think you can delete your own threads, but posts I'm not too sure of. The posting rules at the bottom of the threads and the forums should tell you if you can and cannot.
Searching seems to work fine for me. Both Tripleplay and combo in the JS forum only pulls up that thread.
Actually I'm wrong, the posting rules only show new threads, replies attachments, and editing. Nothing explicitly about deletions. But I'm thinking that posts cannot be deleted, only edited. The tooltip would be in error. Hopefully someone can verify if they can successfully delete a post (not a thread starting one though; I'm pretty sure that's set to forbid deletion).