I found this on Wow Forums a couple of days back. A Blue praised it and said they were aware of the problem but honestly weren't close to a fix.
Here is the script: /run SetCVar("raidFramesDisplayIncomingHeals",1)
All you need to do is:
Step one...Highlight, right click and copy this script.
Step two...Go in game and paste the script in chat. Just open chat and put your cursor in it, and type Control V.
Step three...reload your Ui.
You are done. Enjoy your new lag free game. You will feel like you have a new computer. When I did this I cried tears of joy, I really did. I hadn't been able to raid all patch. Honestly, I was freezing up on Timeless Isle just soloing adds.
I AM FREE!!!
I'm too new to post a link, so to find the post on Wow Forums just go to the forums, and in the search bar enter...5.4 Glitches Very Very Important.
Enjoy my Brothers!!! I promise you this is the real deal. It will turn your cruddy laptop into a new sports car as far as playing this game.
A friendly Mod Edit: OP is refering to the thread on Blizzard's US forum, http://us.battle.net/wow/en/forum/to...8004811?page=1