The pin naming conventions are completely different in the two parts, so the software makes bad guesses about how to reconnect after swapping. Possible solutions are:
rename the pins for one board or the other, but this would break existing sketches. Could also consider making a replacement board and obsoleting the current one (but the same problem would arise when swapping from the obsolete version)
write some special-case code to do the reconnection (yuck)
have the reconnection code bail out--this would at least preserve the layout (this could also be special-case, but isn't so yucky as item 2).
From irasc...@gmail.com on July 20, 2012 01:03:38
This also applies to full and full+.
The pin naming conventions are completely different in the two parts, so the software makes bad guesses about how to reconnect after swapping. Possible solutions are:
Original issue: http://code.google.com/p/fritzing/issues/detail?id=2123