Hi Didier,
Can you provide some information on your system hardware, OS version, and what peripherals you may be using? From the earlier posts, there were several mentions of Wacom devices, so I’m wondering if that is the common element. If you are using a Wacom device check the version of your drivers and see if there is an updated version available; a few issues were addressed in recent drivers particularly with Mac OS X.
Also, does this happen all the time, or just at random times?
Thank you.
Colin Brougham
Adobe Premiere Pro QE