I found that if I installed the dock, then shut down the computer, restarted the computer, Xwindows worked fine for me. I've used sleep mode since, without any issues. However, I've never used hibernation. I am on a 64-bit lenovo, 8gb ram. Hope this is useful to you.
Here is 4 HP themed docks, one for each House. Hufflepuff and Slytherin dock looks best against a black background. I just chose a random picture to use as a background on my desktop just to get these shots. I'm not happy with the picture I chose. Gryffindor Hufflepuff Ravenclaw Slytherin Gryffindor.zip Hufflepuff.zip Ravenclaw.zip Slytherin.zip Dock Images.zip