I also notised that it won't read data matrix codes. At least the one I tried. My brother was installing the app to read a code but couldn't get it to scan (it was just focusing) I however could scan a similar code quite easily. I had an older version of mbarcode (0.1.10-1 I belive) so I upgraded to 0.2.1-1 (the one in devel at the moment, and the one he installed) and sure enough I couldn't read the code eighter. So yes I would say something has happened.

As for the size of the code, the code I easily read w/ the older version is about 7x7 mm.

And of course Love the app keep up the good work.


EDIT: My brother just told me he managed to scan the code w/ mbarcode from testing (0.0.8)

EDIT2: just to clarify I also have trubble reading larger data matrix codes (for example from wikipedia. I just keeps trying to focus, but never takes a picture of the code.