Occasionally, in Firefox 3.6.3 on Linux, when I mouse over a user name, I see that message. It's intermittent - I haven't had any luck trying to reproduce it. The account in question is always an active one - I can click on the screen name and get to the page just fine.
I have heard from another user that this also happens on Macs using Safari. I suspect it's getting some kind of error from Twitter and returning that message. Speaking of errors, it also seems like page load times on my blog involving @anywhere interactions, like loading a "follow @znmeb on Twitter" button, have gotten longer. At some point, I plan to load up the Google speed tools and try to find out what's happening. But if there's something happening at the Twitter end, it would be good to get it fixed, because Google now penalizes slow pages in search placement, and that's not a good thing for @anywhere. -- M. Edward (Ed) Borasky http://borasky-research.net/m-edward-ed-borasky/ @znmeb "A mathematician is a device for turning coffee into theorems." ~ Paul Erdős