If you are getting the replay.dll Error when starting up CSS, This should fix it...
First, Go into Your Counter-Strike Folder.
How to get there:
C:\Program Files (x86)\Steam\SteamApps\(Your Account)\counter-strike source
C:\Program files\Steam\SteamApps\(Your Account)\Counter-Strike Source
Then you want to take the "Bin" Folder and Delete it.
After doing so, It should fix and you can once again play.
Tho we do need to wait for Dawg/Deathkilla to update the servers, But atleast you can get on :p
Love you :p