I'm running the Platform within my Dropbox folder, in Dropbox/Applications/PortableApps.com. When I most recently ran the Platform, it asked me to update, which I did, but the update was deposited a folder down, in Dropbox/PortableApps.com.
Obviously, as a portable app it's not a great amount of effort to shunt the folders around and this doesn't cause problems, but it is equally clearly not how this is meant to work! Not least because if the Platform is in the wrong folder, it doesn't pick up the applications available.
Are other people seeing the same behaviour?