After reimporting that project I deleted, I shared it while it was saving. The browser froze and I had to click the X several times before it would close. Now when I go into the editor I see a blank screen without the navigation bars. See Inside doesn't work either. Every time I do try to access the editor, an Untitled project appears in my unshared projects. Unlike others my cursor does not change to allow typing in, etc, which means the editor isn't just not showing, it probably isn't loading.
Google Chrome, Windows 7.

EDIT: I have managed to get it to work by switching to Internet Explorer from Google Chrome.

This is a weird one! Can anyone else reproduce this?

Also - can you link us to the project in question (on the old site, if not on the new)?