I have downloaded the 0.48.124678 Experimental update but when I go to the main menu my version at the top right is 0.48.124674. I've went back to stable then tried downloading the update again but it won't change and I can't join any 0.48.124678 servers only 0.48.124674 servers. Some people have said it's happening to them as well: http://www.reddit.com/r/dayz/comments/2cd0sq/048124678_exp_update_thread/cjebry8?context=3