Yesterday we updated our website as part of some on-going updates we are working on. Unfortunatly some of the new code did not get uploaded which resulted in the "get latest version" download links and the version checker built into our scripts which pings our website going offline.
This problem has now been cleared up though so if you were told you were running an unreleased version last night, don't worry, you weren't, if you check it again now it will be back to normal.