I noticed this problem on 7.4.3-beta1 and 7.5.0.
I’m using the Mobile Skeleton project. When in one of the “Main Windows”, clicking anywhere on the screen will cause the “Back” button to fire, and will return to the Navigation screen. Seems like the event coordinates are not matched to just the Back button.
This causes unwanted navigation actions when accidentally touching the screen, or e.g. attempting to click on a small component and missing.
Tested on Android 4.0, BlackBerry OS 6, and Firefox.