I am having this problem as well. Not sure if this a mechanical issue, but it may be software related.
I have noticed this behaviour using Propellerheads' Reason, but in scanning the MIDI data via Midi Control Center I can see that the note information is being sent rapidly multiple times.
I have a Maschine, and I'm just not used to this behaviour.Modifying your technique slightly can lessen the behaviour. You almost have to let you fingers stick to keep the release of the notes. On light touches or brushes of the pads, it is very noticeable.
Aside from this major problem, I am enjoying the Arturia, but it requires some very specific in-depth know how to make it work with your programs. But this can be said for many MIDI controllers.
Anyhow, does anyone have a solution for these random double notes that are coming from the pads? Please let me know.
This issue pretty much just kills using the Keylab for drums. How is this not a major issue?
Keylab 47 Version 1.33 firmware
Mac OS X Yosemite MacBook Retina 2012
Update: well I tried reinstalling the firmware and still had this issue. I returned the unit to the store I purchased it at and we even tried a floor model and found it had the same behaviour. Quite sad to see it go, as otherwise I really liked the form factor, I thought the keybed was fine, knobs and sliders were good too. But it wasn't 100%. I may give Arturia another chance in the future, as the concepts were good. I was also quite happy with the quality of Analog Lab, but won't be exploring that now either.
I'd be still interested to hear how widespread this issue is. It seems other Arturia instruments are being affected by this such as the Beatstep. But i haven't seen too many posts about this.. is it just rare? or is it under reported?