Allow pan and zoom when viewing artwork after tapping to make it full screen
When an artwork image is displayed full screen, it may still be too small to read the details. This is especially problematic with CD booklet scans where each image contains two pages. Adding the ability to zoom in on the image and then pan would make everything readable, assuming the image has sufficient resolution, of course. This should be done using platform-specific standard gestures.
This applies both to the artwork accessible when viewing a single album, and to the artwork displayed when expanding the currently playing track in the queue browser. It may also apply elsewhere.
Edit: It would also be nice to rotate the artwork if the text is not reading horizontally.