The only problem I had was that the spell checker would not work. I finally found the solution. JCE was defaulting to google's engine, which only works with SSL. The engine that works best with most php installations is pspellshell, which was not in the config file and not selectable from the plugin screen. If you are clicking the spell checker and getting an error after awhile...read here in their support forum for the solution:
There are 4 possible spellchecker 'engines' to choose from which can be configured via the SpellChecker parameters in the Group Manager.