I've been running Vista Ultimate since early December (RTM) with few problems. I have been using Firefox for years with no problems.

That is until last week or so. Now when I start Firefox in Vista I have a few problems:

1. Sometimes Firefox doesn't start at all. The process starts, but the window doesn't launch.

or

2. If I get the window to launch, all my add-on settings have reset themselves, my home page reset itself, and my other settings have reset itself.

Sometimes firefox starts up fine. Other times I encounter one of the two problems listed above.