as far as i can tell by wandering thru google this is actually somthing to do with setting up servers in steam. currently im getting it for 2.0 as well on any map.
it should get ironed out shortly. until then use won(i know thats a crappy answer).
there is a steam server patch which you can get taht was supposed to adress thsi issue. However, as far as i know teh patch is spotty at best. if you would like to look for it you can find more infor in the forum <a href='http://steampowered.com/forums/' target='_blank'>here.</a>
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currently im getting it for 2.0 as well on any map.
it should get ironed out shortly.
until then use won(i know thats a crappy answer).