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It could be a problem with the codec loader, which has been fixed, but perhaps still exists in lennys build which is a few days old.The probelm occurs whenever the codec changes, so if your first 4 tracks are MP3, they'll be fine, then the 5th is OGG, the WPS will display OK, but the playback remains at 0.00
Please add your support if you think that Multiple On The Fly Playlists (MOTFP :-) ) would add value to Rockbox and enhance user experience.
Maybe safetydan has picked up the ball....
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