I was going to put this in General Questions, but I thought it might be too mundane (and temporary) for that.
Whenever I try to google something from the toolbar, I get a password window pop-up (“Authentication Required”) with the following message:
I thought it might be some hacking at work, but searches on other engines turn up no results. Also, it seems to come and go. Is something wrong with Google, or is the problem my browser/computer?