Why a surprise ?
They looked over the stability, but it’s far from perfect. There are a lot of bugs left to fix.
Plus there are some features spoken about in the manual, but not in the actual firmware (alarm clock visual, cover view music etc.)
I think those are the coming differences in the coming firmware, which would be the first non-beta. After that they could add extra functionality, but don’t get your hopes us. As far as i know none of the archos products have featrues that were not discussed in the manual...