I was looking at the footprints in Altium's Atmel library, and I noticed that many (most?) of the pads had rounded rectangles. However, if you use Altium's own "IPC compliant footprint generator", by default the footprints are rectangular (not rounded).
Is there a specific reason to use one of these over the other? It would seem that rounded pads would be easier to manufacture, and would make a more natural shape during reflow, but that's just complete speculation on my part.
(On a related note, would rounded pads have to be made slightly larger than strictly rectangular pads?)