Many players doesn't have their PB GUID (even me, but I have an etkey). So how it is possible they can join PB servers without guid? One time I was playing on one ET install with my lvl, xp etc. Then I wanted to play on other install without any lvl, just for "spying" players on my server. But then I wanted to go back quickly to the install with lvl and there wasn't this level! I had to restart ET. Is that bug? Why it happend?