I'll keep this brief, to the e-mail I sent them:
Hi guys,
I have very strong reasons to belive I found the source of all the crashes last night. A new beta will be uploaded Sunday morning (08:00 GMT), but there's no scheduled test for it, yet. Most likely I'll set up a server Sunday evening, for 30 minutes of CTF.
I want to thank you guys for showing up, you opened my eyes on some of the remaining errors in the CTF game mechanics. For example, here's a case I forgot to cover for CTF gameplay: let's say a player (Boobicus Maximus ;)) manages to take the enemy flag, then he decides to leave the server. In all beta versions up to the upcomming beta 6, the flag would have beed permanently lost. The game would be ruined.
Thanks to your input however, this case is now covered: when leaving a server, the flag will simply be dropped in the place where the player was last seen.
So, again, thank you.
Herr_Alien