Hello,
I've downloaded the latest Analog Factory 2.5.1 from the updates page, and when I try to install it over previous installation, it creates empty (0 octet) files in my components and VST folders. (stand alone application and RTAS plug ins seem to be OK).
Running on Mac OS X 10.8.2 (Mountain Lion).
I moved the files manually from inside the .pkg file and it seemed to work.
Cheers.