ADD A Z-INDEX TO YOUR ABSOLUTELY POSITIONED ELEMENTS!
While building a web app, I ran into an issue with Chrome and Safari having a strange rendering issue when animating absolutely positioned elements. In testing it worked fine in IE and Firefox so I thought I was going crazy.
Come to find out, if I added a z-index to the absolutely positioned elements that I was animating the issue went away. I was able to figure out the issue after finding this StackOverflow.com answer at
after doing a google search for “webkit animate absolutely positioned elements rendering bug”