Try enabling the skin errors. Look for an option named "Report skin errors" in the General Behavior tab.
Did not report anything or should I be looking for a .log?
EDIT: On the same line, all I did was change the white color in the center, why would the file size of the image change?
I am using PaintNet; I don't see anything about alpha channel in particular.
I just removed the user name and user picture and the menu came back but the corners are square instead of round on glass and reduced like normal.
Attach your skin here and I will take a look later today.
Got it, and you were right about the alpha - install Pixelformer.
Thanks GauravK, that works. Maybe PaintNet will build thin in someday as an option instead of having to rename the file.