OK, encountered a strange problem. Running BG2 as I always have. This time when I went to multiplayer (I've always done this to make up all 6 characters), the session name I always use is there ("Alpha"). However, the second I go to that page it starts adding infinite "t"s to the end of the session name. So it's "Alphatttttttttttttttttttt..." It's not a keyboard problem - this occurs nowhere else on my computer.