Skipping and mixing tracks after firmware upgrade?!

That’s wacky.

Are you sure you’re not using newly Bit-Torrented albums? A partial download can give you results like that.

Otherwise, I’d just downgrade. Go to the Firmware Update thread, copy the link to the new firmware, paste it into a new browser tab and change 1.02.28.zip (or 2.02.28.zip) to 1.02.26.zip or 2.02.26.zip. The old firmware is still there to be downloaded.