Ace the + just refers to all versions newer than 123, and for the 80000000000000 time the "walk through doors" bug was in V121/2 which was only a beta and was only ever installed on Servers 1 & 2 for a short while, it also only affected a few doors (on Astheno & HiSpeed) as it was caused by an attempt to fix the door blocking problem.
All incarnations of LeagueAS from version 123 onwards are bug free to my knowledge (game play wise, 123 had a small bug that caused the clients log to fill up with crap).
This bug is stopped by LeagueAS Version 123 onwards.
And yes if your quick UK you can go through the teleporters the defence use. There is no such thing as a Team Teleporter in normal UT (Eavy did one in the ABP), so SteelHORN added a team trigger to activate and deactivate those teleporters, if your quick you could get through behind a defender.
Thanx