The "+" icon in the upper left corner throws an error when you are not logged in:

  {"success":false,"error":{"code":1,"message":"You are not logged in."}}

For some reason I doubt this is by design.

Also, when you upload a pic for the "screenshot", there is no confirmation after the progress bar disappears. No thumbnail, no "Ok, pic uploaded!". Nothing.

Another note: no place to put hyperlinks when you create a post?!

And I cannot edit my post afterword (to add a hyperlink in the description).