I've also been experiencing bugs with anticheat just today in r1q2 with r1gl enabled and the latest everything I encountered an error in game when the map was switching on vrx.dyndns.org that a anticheat dialog came up and it said:
Your version of r1q2 is out of date and no longer supported by anticheat.
Please update to thue latest R1Q2 release by using the R1Q2 Updater or see http://antiche.at/
for further information.
What did the server administraor for our server not update and we updated so it's causing bugs for us now er? Yeah I dunno...