Admittedly I have only started using the portable build but have noticed that when you click on the Fragments or Size column headers to sort either ascending or descending, they do it opposite to what I'm used to.
In the current Portable build (v2.16); ascending lists largest to smallest, descending lists smallest to largest.
In my previous version of the full version, it was, and always has been, the other way around.
So it's either a bug with the new version or has the portable build always done this?
(or does Piriform use my location and have regionalised to Down Under accordingly )