we have a proxy-server running which routes all the external-traffic in a ssl-context since we are using basic-authetication for external users. For internal users we have kerberos and http running. Unfortunately if im connecting from outside, almost every ribbon-buttn is grayed out.
If the user is from the intranet, can use kerberos and normal http everything works fine..
these dudes had the same issue but unfortunately there is no solution or hint.. http://forums.citrix.com/thread.jspa?threadID=303918
To narrow it more down, i experience that the notification box is stuck in loading condition when i expand the dropdown menu for a list item in a document library. See in screen below