Well did it update the client files after you ran it as admin? The latest version is r3043. Try doing these:
stats could be corrupted, try resetstats in console
If there's checkerboard loading screens on the map, repair https://plutonium.pw/docs/repair/
If you recently made/downloaded any custom camos or textures, delete them.
Edit: Seems like joining a server too quickly after starting the game causes this - wait for a few seconds and let the serverlist populate, once its done, then try connecting to the server.