I noticed a minor problem with the url used to get the gravatar image when accessing the back end over a secure connection.
http://en.gravatar.com/site/implement/images/
According to the above page on their website, when requesting a gravatar using a secure url, the request needs to use the url
secure.gravatar.com/
...
instead of the usual
www.gravatar.com/
....
In the current version of the template (1.6.3) it uses the url
www.gravatar.com/
... which fails.
This isn't a problem that really bothers me now that I know why it's occurring. But it bothered enough to find out why it was misbehaving. :cheesy: