I notice 2 server problems A minor one is, that the server sometimes send the client the face #0 as used face. This face is a dummy on server side (bug.111.png) which is not used from client. The other point is, that i had removed the face cmd from the sdl client, because i always send PNG|CACHE to him. Well sometimes, when i start the server (different archfiles/pngfiles) he send the face cmd instead of face1 cmd. It seems the server skips the checksum part as a side effect.