Just to add that I too have been suffering the 'notes not loading' problem in v6.0.3. Well, I haven't really been suffering because I just stopped using Evernote: software that doesn't work isn't any use to me. After reading a post here this morning, I visited the Mac App Store, found v6.0.5 (why wasn't it flagged in my updates?) and duly updated it. Evernote now seems to be working fine again.