My guess is that it was a caching issue with the 6.1.2 release and an older file from the 6.1.0 release. Rolling back shouldn't have been necessary, but it could have temporarily fixed the issue.
What I'd recommend is re-installing 6.1.2 and clearing both your Joomla and Safari caches. Of course, if you still run into issues after that, just let us know, and we'll gladly help investigate further.
Thanks,
Alex