Provide a more evident link to the new inbox
To get to the new inbox now requires the user to click on the big blue 'bliss' logo, which is not obvious if you don't know about it.
There should be a labelled link to the inbox along the top menu, perhaps to the left of 'Albums'.
I think you're right about not realising the logo is clickable, and making it more obvious about how to find the Inbox.
It wasn't obvious to me, as a newish user, that the bliss logo is clickable. I'd been reading your blog, which mentions a whizzy new inbox, and I couldn't understand why I wasn't seeing any way to reach it. I'd been thinking of the Albums page as the homepage, as that's the default screen that comes up when the program is launched on my Mac.
We were discussing this just this morning! Thing is, it feels like a redundant link. Do you think it's just that it needs to be "re-learned" that the "bliss" logo takes you to the front page, and the front page is (currently) dominated by the Inbox?
It could be that the Inbox gets its own page later, and we change the home page to have a smaller Inbox is combined with stats and other 'signposts' on the homepage.