Sorry if i write in english, but i don't understand german (google translate helps a bit btw 
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I notice that sometimes our MW2 servers with mam stucks on map and players cannot joins teams but just stand in spectating mode, sometimes map goes black&white too
manu log when server stucks:
11:45 [09.02.11 10:58:37] Notice: Next map / map restart
11:45 [09.02.11 10:58:37] Notice: RCON connection established (xx.xx.xx.xx:xxxxx)
11:45 [09.02.11 10:58:37] Notice: Current map: mp_highrise (sd)
11:45 [09.02.11 10:58:40] PHP-Error: Notice in home/xxx/xxxxxxxxxxx/adminmod/classes/mod.class.php:294 => Undefined index: g_teamname_axis
11:45 [09.02.11 10:58:40] PHP-Error: Notice in home/xxx/xxxxxxxxxxx/adminmod/classes/mod.class.php:295 => Undefined offset: 1
11:45 [09.02.11 10:58:40] PHP-Error: Notice in home/xxx/xxxxxxxxxxx/adminmod/classes/mod.class.php:296 => Undefined index: g_teamname_allies
11:45 [09.02.11 10:58:40] PHP-Error: Notice in home/xxx/xxxxxxxxxxx/adminmod/classes/mod.class.php:297 => Undefined offset: 1
11:45 [09.02.11 10:58:40] Notice: Updated teamnames ( vs. )
game servers are on a linux machines, it seems like manu admin mod cannot load teams infos, in fact it says teamnames ( vs. ) instead of something like teamnames ( Allies vs. Axis)
i hope this could help you 