Hello David,
Since I've got the same problem, you might check my files as well.
Used the cc icon in the menu bar files > view on web > page not found (screen 1)
refresh, same problem > server problems (screen 2)
click on files (in the web browser) > works (screen 3)
click on a folder first time (DYP) > page not found
second time > works
system: MacBook Pro late 2013, osx 10.9.3
thx for you help (I could really use this for my clients, but after complaints I had to use wetransfer again)
PS one more thing, files show up just fine on my mobile devices (iPad air, iPhone 6)
Stefaan
