Issue #1: As mentioned by Spirited, this ia a client-side bug. AFAIK, clients like 4351 were fixed, so it must have been fixed in-between. You may be able to find a client that is fixed and does not have too many packet changes (i.e. 4351 won't be compatible as-is). Issue #2: I'm not sure what you are referring to, so maybe it was added in later clients. Is it the "PvP" toggle button to hide UI elements? If so, it was definitively added later when the UI became so cluttered that TQ had to add yet another button :P Issue #3: Labyrinth, Gano, etc. are all part of the 4330 client. Basically, you can see it as the version with 2nd reborn JUST before CPs (lottery, etc) were introduced. While there might be some bugs (I experimented with this version and never used it live), it should be decent. The original base (COPS v6) was used for my live server back in the days (so yeah, it supported more than 10 players :P). Also, as pointed out by Rezlind, they have been using this Enhanced version without finding major bugs.