Gahhh! You have the same problem I do! Except with me, it's only on my home computer--the one I was using when LJ development reworked the code about a year ago. Remember when they redid the links so that every one is http://username.livejournal.com? I think it might have something to do with your username and my username both having underscores, then LJ changing our usernames for our home pages. Or I could be talking out of my ass.

You're the only other person who has the same problem with my username. I think the problem's me, not you. I'm a paid user too, BTW. I never bothered opening a trouble ticket but I really should.