I'll try when I find the time. I noticed yesterday in a .ai with over 100 layers, if you 'ungroup' something it seems to go though all the 'layers' quickly to sort things out. It's new since v29! Never ever had this problem on mac, Illustrator was lightning fast. But now with ungrouping or and even Sending layers to Front or BACK, there is a delay! 1 to 2 seconds you cannot use the mouse! very annoying.
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