When I am browsing my own blog, I get that tiny bar with helpful function shortcuts ("See", "Manage", "Write"...), which is very useful. I think there is a bug with the "Email subscriptions" option under the user name, at the right of the bar. When I select that option, I get a "Global settings" screen letting me modify my email address and notification option, but below that the following message appears:

Blog subscriptions

Fatal error: Call to a member function on a non-object in /home/bit/public_html/blog/skins/_subscriptions.php on line 67

This is pretty clearly a bug, I think, because I have never messed with emai subscription options. In fact I went to that menu by plain curiosity.