My version does not match the server's.

[Unfocused]

I've got GMod 9.0.4. When I try to join a server from the server list (which is filtered to show only GMod 9 servers) I get this:

"Your version does not match the servers. Please restart the game"

I restarted the game and it didn't help (why would it anyway o__O?).

 

[Cheesy_Gman]

Happened to me too =( try reinstaling?

 

[Rapstah]

Garry has broken GM9 multiplayer to promote GM10.

 

[Unfocused]

Garry has broken GM9 multiplayer to promote GM10.

How nice of him.

 

[xvillanx]

Nah i heard that he dosnt support gmod9.04