Samer:
I agree about slider highlights, the gray (#EEEEEE) is a bit hard to see (what it looks like now: http://cl.ly/image/2y2k1m1K3j0F). Maybe change to slightly darker (#DEDEDE) like this: http://cl.ly/image/341Q1i3W472u, or use a little inset shadow like this: http://cl.ly/image/2S070B082G1o
Looking pretty solid overall though!