Topic: FF800 pops / glitches

Hi!
A few days ago my fireface 800 started popping / glitching. I've never noticed this before this.
Did I do anything specifically before the popping started?
I carried it in a bag for about an hour in ~0 degrees Celcius.

Characteristics for a pop:
* High frequency.
* Lasts for a very short time, just a "pop".
* The output volume seems to correlate with the pop volume linearly.
* "Playing around" with the ff800 has decreased the pop interval from ~1 / sec to ~1 / minute.
* 100% load on all cpu cores doesn't make any noticeable difference.

Failed solution attempts:
* Downgrading from ff800 mac driver 3.14 didn't help.
* I haven't been able to downgrade the firmware. I get error 20000000 or error 50000000 in the Fireface Flash application.
* Affects all machines (several mpbs and one mac pro) I've tried it on.
* Affects both os x 10.7 (Lion) and 10.8 (Moutain Lion).

I'm in a big need of my ff800 and appreciate a solution extremely much.
Regards,
Fredrik