Thus far my MD600 hasn't reverted to doubling or tripling for that matter: all entries are still normal on both Control:web and the iPad2 with iOS5. Last complete reboot was yesterday 22 October, earlier than it is now, so at least 24 hours have passed.

BTW I also saw the doubling effect when searching by manually added Tags.

Rowland Model6/BPS6, Rowland Coherence II, Levinson 390S and 37, AudioAanZee Reference Flow music server, Rowland Aeris DAC, Rowland Cadence phono stage, Pass Labs Xono phono stage, Yamaha PX-2 and Thorens TD 160MKII, Transparent Ultra and Reference cables, Apogee Diva magnetostatics (refurbished).