I can't remember now why I chose ReadItLaterPro over Instapaper - it was a few years ago, and I think I just preferred the look of RIL, but the name was always less than brilliant, since it was quite generic. Both are supported well by the iPad and iPhone apps I use, although the newcomer that's been getting all the press recently is Readability.
The ReadItLater app has just magically renamed itself and re-iconed itself on my iPad, so well done developers - so far - for making the transfer smooth.
Likely the user updated all apps as people routinely do and the icon changed. The purpose of saying "magically" is that it isn't something the user spent any mental effort on but it just happened.
That sure must happened before to cormullion, many apps tweak their icons during update. Since he said magically I would like to clarify what does it mean (and we may learn something new :) ).
The ReadItLater app has just magically renamed itself and re-iconed itself on my iPad, so well done developers - so far - for making the transfer smooth.