Animating "right:" broken + overlays ignored

[Kylok]

Hey Ben,

Great idea for a plugin, I have a site that is constantly doing lots of jQuery animating and I'd love to use this. Currently there are a few issues with it on my site, though. Here's a link to the page in question, followed by a test implementation using your plugin:

http://www.kyleokaly.com/
http://www.kyleokaly.com/test.htm

The most obvious issue I think has to do with transitioning the "right:" property, which that big circular porthole thing does onload (the thing below it transitions "left:" and it seems to work fine, and I tested changing the porthole to using "left:", which fixed it).

A second issue I noticed on Firefox 19.0.2 for Mac is that the animating element seems to ignore overlaying elements while transitioning if the elements weren't covering it before the transition. (Try transitioning from the first section, "Music," to any other section and watch how the partially-opaque masking div to the left only pops over it after the animation ends.)

I didn't notice any other problems off the bat, but feel free to compare the functionality of this test page vs. the original page if you'd like to look for more small differences in behavior.