For anyone else having issues with Disqus on sites using SSL, you might find this message I received Aug 8, 2012 helpful:
These issues are system-wide in Disqus right now. Similar to uninstalling and reinstalling, upgrading would not yield any benefits. To clarify on what's happening here, there are two issues:
- editing comments via SSL does not work;
- posting image attachments via SSL does not work.
As you can see, both issues are related to the fact that the actions are being performed over an SSL connection (i.e., HTTPS) rather than a standard HTTP connection. Other sites on which you are able to edit comments and attach images are using HTTP connections. Adding additional SSL support is something on our radar.