As an author of several skins, I find it every frustrating that Winamp reuses certain buttons in different places. In other words, the same image in the skin bitmap is used for two seperate buttons in the skin. (It happens with the three little buttons in the top right of Main and Eq) I would like to see one image per button. I just makes things easier.
Also, I would like a new button in the skin... one that changes the look of the Stop button if the user has selected "Stop After Current." Then I wouldn't have to go right click on the Stop button to find out if the option is selected.