Hi all,

we are in the process of moving a number of apps and their convoluted
logic from older OSes (1.6) to 2.2. Are versions 2.2+ backwards
compatible
for the most part with older versions? What are the most profound
changes that need to be done? Most of these apps make use of data
on the SD card (read and write to it) but the rest of the
functionality is
modest.

I  know this is a loaded question and I am not looking for a
comprehensive
answer but more like major points/directions to follow. I was thinking
also
that Mark's books may come handy since they do progressively walk
through
versions.

Thanks

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