This is also true in Google+ and Google Reader. It really throws off my flow. Whenever I try to go back to the main page, I click the logo a few times before I realize it doesn't work anymore...
A few weeks ago, in G+, the logo would give a menu of services, which was also not useful for me.
A few weeks ago, in G+, the logo would give a menu of services, which was also not useful for me.