Sorry, I guess I should provide more info.
The current version changes to native ssl. When I try to downgrade to either stable or release I start getting random ssl errors in whm. Everything will work fine if you login without ssl. When using ssl some of the links in whm will just give a "page can not be displayed" error.
It does not completely roll back to the way it was. I have tested this over and over. Downgrade to release and I have errors. Downgrade to stable I have errors. Upgrade back to current and no errors.
Some examples of links in whm that give the wonderful page can not be displayed error.
*When I edit some zones and save them.
*In cPGS Configuration/download game server files/127.0.0.1 and click download game server file and you instantly get the error every time.
*In Tweak Compilers it sometimes happens if you click disable compilers.
See also
http://forums.cpanel.net/showthread.php?t=57222 and read the post by chirpy.