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It used to make problems with high-bitrate (low compression) FLAC files (sometimes the playback was interrupted by extremely loud artifacts, kinda sounded like /dev/urandom), seems be gone now, but I'll keep testing.
I was able to repoduce the problem where the touch screen stops working.1. go to Settings->Theme Settings->Colours2. go to Background Colour and change it to #0800003. go there again, this time changing it to #000000
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