[andi67]

Well clients must have downloads allowed so maybe this is your mates problem and excuse me to say I never had problems with skins errors , not on dedicated not on listen servers , not css , not dods , not hl2mp.
And believe me this plugin is one of the most tested plugins you ever seen by myself and other guys who tested for me.
So red errors or invisible skins means not all files are downloaded correctly/missing files on game- or webserver or outdated models that need a recompile.....