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I'm not sure what you mean by HEAD version
System -> Rockbox Info -> Version: xxxxxxx-13****
Getting some hangups with the past few updates. Extreme slowdowns while playing files - happens completely at random. Any button press would take a 5-6 second delay before executing the action, buffer would take up to 30 seconds to build up, screen fade-in/fade-out was noticeably slow.Went back to an earlier build of Jan. 15 which solved the problem. Doesn't bother me at all, just making it a known issue.
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