The Action Half-Life site has a version 2.1 update that contains two new .dlls for Action Half-Life. In addition to the patch, they have a tip for server operators having trouble getting teamplay to work ("You need to run your server config file BEFORE the map loads"), as well as a request that players stop using non-Action Half-Life player models when playing AH-L, since they do not have the right animations, which causes 'funky' stuff like dead bodies that remain standing up.