I've been having difficulties with iGoogle and Firefox. When I try to edit tasks in iGoogle, the frame refreshes but doesn't change. When I try to log in to rememberthemilk.com in Firefox, I get logged right back out and I get this message:

Remember The Milk automatically logs you out of your account when it detects that you've logged out from another browser window, or when you login to another Remember The Milk account from another browser window. This is done to protect your Remember The Milk account, and to ensure the privacy of your information.

These problem started at the same time so I think they may be related. I've tried clearing cache and cookie to no effect, but I'm not having this problem in Safari. I'm using Mac OS X. Any thoughts on whether the problem is on my end and how to fix it?