Here's an easy effective way to test a split RAR archive for damaged files. Easily discover which file(s) are corrupt, and then you may be able to repair them
Step by step instructions on how to install a free command line UnRAR tool into Mac OS X. Will allow you to test and extract RAR archive files in the Terminal Command Line.
Picasa 3.9.x allows us to embed the face recognition data into an XMP tag on our photos. At long last. However, Google in their wisdom decided to not make this retroactive. Meaning all your existing photos will NOT have the face data embeded even when this feature is activated. Only new photos will get the desired embedding. What follows is detailed instructions on how I (and many other people) have embedded the face recognition tags into existing photos.