I am now in another machine and it happens too. It is progressive (at least in this machine).
Do a search in tracker, close, now reopen it. The tab of the results is a bit more rightwards than previous time. Close, reopen: the tab is even more rightwards. After two of three sessions, the tab has reached the right border of the window and, as a result, it has become invisible. By the way, do you know about any issues in searching inside OpenOffice text files? I make tests with chains that I have inside an .odt and most of them are not found. If you like, I can submit this other bug against tracker. Thank you.
