Firefox turning off cookies option?

Over the last couple of days Firefox (v.1507) has begun to regularly uncheck the “Allow sites to set cookies” option, effectively logging me out of Amazon, flickr, wordpress, and everything else. I can go into the dialog and change it, and within a few minutes or hours it’ll be unchecked again.

What’s going on here? I can’t find any reference to this bug online. Anyone else seen this?


About Steve