I just noticed today that everything seems to be working correctly! I hadn't bothered even trying to use the option in a while but left it running for the heck of it. The only thing that's changed was I updated to Firefox 2.0.0.14 recently. Works great now!

I use https, but I have the script set up to work in both. I've tried redoing the script with @gmail.com and without, no difference.

I did just notice today that it seems to work with GReader, which I've just started using, but still not with Gmail. What "included pages" is everyone using for Gmail?

Update: Apparently if I close all google related pages, disable the greasemonkey script, re-enable the script, and then open my gmail page, it works again. Don't know if this helps with identifying the problem or not.

It works great for me, until I use it... Meaning, when I first start Firefox up and go to Gmail the box is there, and I can select it to easily switch to one of my other Gmail accounts. However, once I use it the first time the box never reappears unless I either restart the browser or reinstall the greasemonkey script.

I've tried closing the tab and opening mail in a new one. I've manually switched back to the other Gmail account, I've refreshed the page dozens of times. Nothing seems to make the script work a second time.