With the latest patch added to Modern Warfare 3, servers using the random map cycle (*) asterisk are known to crash. This bug has been confirmed and a fix is in the works. Until then remove the asterisk from your "Default.dsr".
Even though this has been resolved and no longer crashes the servers, it has come to our attention that the random number generator MW3 uses is known for repeating maps. I would suggest that you define a certain map for each .dsr.
<@TimeX-NFo> Hey, we used to have to carry our packets to the servers.
<@TimeX-NFo> And it was upstream, both ways.
<@TimeX-NFo|away> You're asking the old dude for help?????