OK, I know you gonna yell at me that my buttons are sticky or such but read on:

After going to 10 the volume thing completely disappeared for me until this morning when it happened again. No big deal, I can live with that if it is happening once a week, I just wanted to let you know.

What is AGAINST the theory of a mechanical fault:

The number of times the bug happens changes with software upgrades. If it would be a hardware thing, it wouldn't change with software.
I can feel the 'click' of the button all the time.
The button got space around it in the front-panel. I can move it around in the hole.
If the button would stick, it would move through the menus by itself. That doesn't happen.

As I have said, I can live with that, it's just I want to let you know it not completely gone. BTW, there is no sun here, just rain...

Cheers, J.