I use SkyDrive to access my files from my desktop and my laptop.  I've noticed lately that when I open a few documents, the file is gone.  There is an error that comes up that says there is an encoding error or the file will be completely blank.  For example, a 20 slide presentation will be completely erase and in its place is a blank template.  A document will not open.  A file conversion window will appear asking to select a text encoding.  The document will be completely blank as well.  If I try to open a .pdf file, an error message would appear saying the file was corrupted.

It's not just a couple of files.  It's at least 20.