StateListDrawable in ListView strangely off-colored in certain conditions

Question

I have created a ListView with TextViews as items - most of which have a certain color as background, but some have a custom @drawable/shape as background (i.e. the top and bott

Answer 1

After endless research and guesswork, I've found the reason myself: Dithering! By disabling dithering in the state-list selectors, the problem magically disappeared:

It seems that dithering is only applied under certain conditions (as described above) which is IMHO not expected behaviour, yet treatable by disabling it completely.