Yes, I've tried to hold buttons (one at a time or both) in several ways and combinations for several length of times. The only reaction I ever got was a single flash in white. And I can't even say when or why that flash happened since I can't reproduce it.
I've phoned the store this morning and they ordered a new Auro for me from their main store which should arrive on Monday.
The only reason I'm that patient is because I know I will get a replacement - and because I still have my Touch (which I'm going to keep anyway since it's more portable than the Aura and has worked like a charm since I've bought it).
On the plus side I will not be distracted from my studies this weekend and will treat myself to some nice food I can only buy downtown on Monday.