Does anyone have a problem with there B50 rocking on a flat surface, front right on 2 units I own is lifted about one quarter inch from table. If you touch the unit it on the front it rocks back and forth. I noticed if you take the cover off or back the screws out it lies flat.
Has it got a QC sticker on it? 
No just a serial number on the bottom. Last three digits 133.
I assume this the 133 one built.
Not good though, someone should have checked the product prior to packaging and dispatch.
Steve
Yeah, I unpacked my B50 and wondered the same. Its not standing flat and rocks quite a bit when touched. The Case i warped and thats the reason for this issue. Would have expected a better QC for such a more pricey device!
Tried to bent it back a little bit but to no avail.