After upgrading to LR5 and Macbook Pro I have experienced that adjustments and keywords disappear when I move files from one location to another. And yes - I perform all moves from within LR in the library module. To be precise - on those occasions I have moved files from one external drive to another external drive. My LR database is on the Mac main drive.
This is very annoying, and maybe the most annoying part is that I have not been able to find out where my stupidity rest.....
All Lightroom adjustment resides in its Catalog untill or unless you are exporting the images with the edits.
Please make sure you are workong in the right catalog.