TorBrowser remembers location of last locally-opened file: "File > Open File ..."
This seems like less-than-ideal behavior.
Ex., TBB is used as the local Tor, Vidalia and browser by Alice, on her computer. However, Bob also has access to Alice's computer because they live together. Alice was looking at a local file she doesn't want Bob to see, but Bob does see the file when he too uses TBB as the local Tor, Vidalia and browser. Of course, Bob found the local file by mistake when he was trying to open a different local file.