Finally, let me add that this problem has nothing to do with openness, open-source, or fragmentation.
Well it's kind of related to fragmentation, because even if Google fixed all the bugs ever it would mean fuck all as long as the device manufacturers refuse to update their devices.
The cheap Chinese flux from DX and similar (counterfeit Amtech and the likes) can allegedly leave a conducting residue that the genuine product doesn't. It'll still work for soldering, but cleaning the board afterwards becomes more important.
Why assume the A4 is a dual-core PowerPC when it's built for an OS that restricts the use of multitasking?
Because Occam's razor tells us that this surely must be the case. Of course you put a dual-core processor to churn binary translation into your mobile device!