For a few days now, I can no longer use the Google Reader bookmarklet (the one shown on the 'Your stuff' page in the upper right) on one particular machine with FF5.
Whenever I do activate it, the usual frame pops up, but it says:
Oops. You're currently signed out.
Please take a moment to sign in to your Google Account to share this page in Google Reader.
When I follow the link and do that, I get back to the same page with the same message.
I've tried logging out of my Google account and back in. I deleted all the Google-related cookies I could find and logged back in.
I asked someone else to try it with his account on his machine and it does. I've tried it on another machine with my own account (FF5 as well) and it works there. I've tried it on the same machine with another browser and it works.
Anyone got an idea how to fix this for my main browser on this machine?
Update: I'm still having this problem with FF6.