here is an automatic fix for people that do not know how to use regedit, it does exactly what ZeP describes in his post
SheppardFix.zip
give feedback if it works as a workaround for you and PM me in lobby (UES_Sheppard) if you got problems
1. Unzip the folder
2. double click on the file
3. press ok a few times
EDIT: you ahve to run it before every new start of the lobby if you got that issue
EDIT2: seems like ZeP fixed the issue completely now just update lobby if you haven't done yet
IF IT DOES NOT WORK:
there are maybe some files missing cause not all were new generated since i had the issue and removed them the first time
whatever if it does not work REUPLOAD THE FILE, it will have a intern log then
unfortunally this forum doesn't like .reg files so it's zip-folder now
Documentaion:
http://paste.org/53897