I've had several users report this behavior to me, but I have not been able to duplicate it myself.
If they are editing a file for which they need to track changes and use the Arbortext keymapping Control+Shift+E to toggle TrackChanges on and off, every other time they key Control+Shift+E the Preferences dialog window opens. I have searched in vain for any mention of a keymapping which opens the Preferences window and can find none.
Has anyone else experienced this behavior? Any suggestions on how to fix it?