I researched your trouble a bit, it seems to be related to VBULLETIN (the software that runs the Forum) itself and specifically the templates part. Therefore, It doesn't sound like anything wrong on your PC or browser. I couldnt find any local settings in the browsers that might help. I am at a loss to explain why it effects only you and not the others and why now and not before. There are probably some clues in the server logs but thats where my expertise stops.
Anyway, I would drop a PM immediately to Redleg.
"My center is giving way, my right is in retreat situation excellent. I shall attack." -Foch
I am from NYC. I fly a French flag because I work in Paris.