I run into an invisible enemy...nice...first time THATS happened. And he killed me, because he was 100% invisible...not even sure why he was aggro'ed in the first place...
I had an invisible Pit Wolf after the patch, but I was able to kill it and loot it as normal.
This patch improved my FPS in lighted/misty areas by a few points. When your FPS is as low as mine, you notice the difference! I went from about 8-11 in such areas to about 14. When you think about it, that's a 30% increase!

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I have had no problems with bookshelves since the patch.
Still have problems with my stuff in my house falling down.