There has been an error reported for the patch which prevents it to work, even if you install it and don't get any error. Oracle is working on a fix for this.
More info at this thread Re: [PATCH RELEASED!] Next Jdev 12 release date compatible with IE11?
I was looking around on coments on the patch id but couldn't find anything.
Your response and this new information gives me some hope.
Get some sleep.