kartu,
Since uninstalling using the new automatic uninstaller (May 30th), I reinstalled the new version (2.0.12beta) and it works flawlessly...
No battery drain, no false button presses, nothing.
I guess it came from some residual code that was left in place until I used your uninstaller, maybe by the russified firmware, or the previous version of PRS+.
Anyway, thanks for your help and your amazing firmware !
Now, go work on these custom dictionaries