There are over 400 colours in this, including numerous different levels of transparency. I think this piece will need quite a bit of clean-up before it can be accepted to PixelJoint. The easiest area to start with would be all the brown and yellow colours. Many of them are very similar, and you could reduce them all to perhaps 6-8 colours without a noticeable difference.
The palette's certainly much cleaner! Personally I think it could use a little more cleaning up as a lot of it has some single-pixel noise that doesn't add anything, but that's up to you.