Yes we were able to solve the issue in our case.
It was due to
In the vhost of each blog we have entries for secure and non secured areas under port 443 and 80 respectively as
Allow from all
Where AllowOverride was set to None instead of All for https so webserver was not able to recognize/read virtualhost for the given directory.
Changing None to All solved the issue.
Hope this will help in your case.