[>BKA< T Wrecks]

Ok, the ladder problems can be solved by rewaypointing. BUT I don't feel the slightest motivation to fix up all waypoint files AGAIN! Besides, what do you want to do in places where both the ladder and the ceiling aren't high enough for this workaround? Nah, there's something in the code that has changed, and it must be changed back.
It makes no sense to stick to PB 2.5 WP compatibility when at the same time 90% of all waypoint sets with ladders are technically compatible, but totally ruined for gameplay. No way!

The crossing flag cannot be set manually. It's a flag that will be automatically added to all T important, CT important and camp waypoints. These are the points that will be "patrolled" by the bots. When spectating a game, you might witness a bot running into a corner where a camp WP is placed and then running back - they are "patrolling" the camp spot... Since most camp WPs are in some obscure corners, they are not used for normal navigation very often. But the "crossing" flag will attract bots to camp WPs every now an then.