Ha! Figured it out!
If you go and try to export your collection from your "Public" view it fails. You have to go to "Collections" as though you are editing from the user menu and export from there!
Can someone try clicking on their own name and navigating to your collection and attempt an export? I was unable to get my collection that way in any browser. It just opened a new window. I tried it on another user and I was unable to export their collections even though the button is there.
URL DIFFERENCES:
WORKED:
http://nintendoage.com/index.cfm?...
DID NOT WORK:
http://nintendoage.com/index.cfm?...