Thunderbird loses my Master Password ... again

Remember the last time Thunderbird killed my Master Password?

It happened again.

This time I know a little bit more about what led the Mozilla mail client to screw up so badly. (I'm running Windows XP, in case you want to know).

I was moving some mail into a folder — lately I've been moving all my mail into one folder or another, trying to keep the inbox clear.

Thunderbird appeared to be crashing. My mail wasn't going into the proper folder, I got a message when I tried to do something else in Thunderbird to the effect that "the Inbox folder is locked."

So I ctrl-alt-deleted to get the task manager, then quit out of Thunderbird.

When I restarted it, my Master Password wouldn't work. Yep, just like the last time.

Luckily, as I also found out the last time this happened, there is a fix

But what good is a Master Password — or Thunderbird, for that matter — if I keep having to forcibly reset the damn thing every time the mail client crashes.

And why in the hell is Thunderbird crashing so much, anyway? Should I be blaming Thunderbird or XP?

Clearly this is going to require a little more digging.