Firefox has, for some unknown reason, become unusable. Popups no longer work and cause the browser to hang (which makes commenting at other blogs difficult).
It's a plug in problem, but not due to any one particular application. If Ad-Block Plus, No-Script, or any of several other add-ons are installed, this happens. I have to disable all of them in order to get it to work. And if I'm going to be assaulted with ads and popups that I didn't initiate, I might as well use Internet Explorer.
Update – Hmmm. A simple reboot fixed it. Weird.