I have a MS PPT file that I created and then saved to my SkyDrive account.  After a couple of edits, I saved it again (same name) and closed out the app.  The upload center now gives me an error message saying "upload failed, please refresh".  No options are working at this point (open to resolve, save a copy, or discard changes).  The file name is that same PPT I was just working on.  I read in another forum to go into the SkyDrive website and delete the file, so I did that but nothing has changed.  I've tried refreshing and the file just sits there in an error state and I can't remove it.  Any other ideas?