If that (strange) 2-pixel issue is a hard requirement, it's easy enough to tweak the script to forcibly clear those columns; it really only makes sense, though, if provisions for scaling to the right size are added. Right now it will blissfully stack any random sizes of images, with predictably useless results...

Glad you like it, and even gladder about the format suggestion.

Note that my source images were extracted from 0.13, so I knew that the bar had been fixed. Hopefully those sources will be handy to convert the Default theme over; I've got the hang of extracting these now, so if you want others (I'm thinking Hildon) converted, gimme a shout.

(The key is to take the zero-image as a background and (since it was flat 20% alpha in the interesting regions) map the alpha values in the other images as 20%-100% -> 0%-100%; thus not messing up soft edges too much. It would have been altogether too lame to use a transparent background, and leave the shadow in each volume/brightness image.)