We have upgraded a MOSS 2007 publishing site to SharePoint 2010 Enterprise. Having done this we have found problems with opening Document Libraries in Explorer View.
Most users access the site via http and view published pages only. Content Editors use a secondary URL via https.
Explorer View worked fine on the 2007 site and we have mirrored the set up from the old site, but it returns the error message "your client does not support opening this list in Windows Explorer".