I can see a pattern! Probably a good idea to list the serials of different hardware revisions.
edit: Oh wait, A320BK is probably black, A320WH white. Now i wonder if it´s the same with the unpawed ones.
... pratically there are eight different serials
4G---------internal memory (2G)
96007568-n° of the console produced
HK---------Stand of course for Hong Kong
The pawed (know as the 1st model produced) have the serial printed in the case, and the first two versions doesnt have any HK letters at the end of the serial like the two new produced (the cheap ones)
So, it looks like that the 1st Dingoos are the best ones, they dont show any problem at all, same the 2nd version too (the unpawed export version), but the new owners with the HK models are encoutering problems about freezing homebrew and native emulators, but i read some posts about emulators that perfectly works with the new ones.
If something is wrong let me know cos' i will edit the post