Currently Being ModeratedNov 4, 2013 6:24 PM (in response to jensab)
If you have Dropbox or Google Drive installed one of them may be the cause. I was using Dropbox and it seemed to be the cause. I unlinked from Dropbox, removed the App and downloaded the newest version and reinstalled. All is well now. As for the steps for dealing with Google Drive I would not know as I am not using it but have seen it mentioned on the discussion boards.
Hope this helps,
see this discussion