I was trying to upload an advancement file from TroopWebHost into Internet Advancement 2.0 and I kept receiving an error message in Safari. The error message had no details.
I switched to use Google Chrome and the same advancement file from TroopWebHost uploaded without an error message.
I saw no strong suggestions to use Google Chrome so I thought I would add this to the forums.
UPDATE: this appears to be fixed and Safari can now (as of 7/20) be used to upload TroopWebHost advancement reports in Internet Advancement 2.0.