For the last firmware, few applications need patch files to make them compatible.
RadioHex: use the lastest version
Copy/Delete: there is a patch version for the last fw.
MPlayer: use the lastest
CinemaSix: need patch files.
I did an upgrade on Saturday (3/26) with the most recent version - think it was 2.15 (or 2.0.15) and I thought I grabbed the most recent downloads of each app. It seemed weird that none of the 4 apps worked. I'll check each app's info to see if they specify a version of the PB software.