Excellent skin!
The only thing that in my opinion would make it better is to make the edges of the sidebars more prevalent (maybe a subtle grey color). They are white now and it seems like they are non existant which make it difficult to grab and move around.
Some of the text and icons would be better if they were a tad darker to improve readability.
Just my 2 cents otherwise I like this skin very much. Definitely a keeper