I recently upgraded Firefox to v3.5.1. I also just noticed saved userid/passwords weren't being filled in. I checked FF Tools->Options to check my saved passwords (like i've done many, many times in the past) and it is now blank. Everything has been deleted! So this post is part warning and part question. Anyone else see this happen as well? Seems a quick Google search showed someone else posting same problem. So be warned before upgrading!