I think this is due to the font issue, so:
You can try lowering the font size using PSSetup utility.
Downscale it until 50% of its original value.
That should allow you to enter the game.
Then, you can "restore" your char description (modify it again so now it's suitable) log out, change font scaling to 100% again, and join in without many issues.
Maybe Ary post could be more explicit when workarounds are found. Since that was fixed in CVS there's no other comment, but there has to be consciousness that fixes on CVS might take a while before reaching the general public, thus, if a workaround exists, it should be kept for reference, together with the fixed on CVS statement.