I see that "search by thread number" has a bug, and we are correcting that now.  Regarding specifying which thread to search for the thread number, that has always been a part of that search approach.  Maybe I am misunderstanding your comment?

It appears that the rest of the advanced search function is working correctly. Let me know if you've turned up any other bugs. 

Again, thank you Roberta!

M*_Darrin