Ahh.. glad you found a solution. If you have the Page Cache plugin enabled, definitely make sure the "Browser Cache" option is *disabled* as that will cause problems. Beyond that, simply purging the Joomla cache should fix the upgrade problems when moving to Joomla 3.5.. but good to know that disabling it altogether definitely fixes things if necessary.
If you need anything else, just let us know!
Thanks,
Alex