I believe that's when you're logged out... the login button has the phrase "Login with Mozilla Persona", and as buttons don't wrap with Bootstrap, and the button is beside the logo... it forces the page to be fractionally wider than it should be... which has the effect of chopping a bit from both side.
I've spent a little time today jigging the styles for mobile but realise I need to spend more time on it, so I'll look at this tomorrow.
I believe that's when you're logged out... the login button has the phrase "Login with Mozilla Persona", and as buttons don't wrap with Bootstrap, and the button is beside the logo... it forces the page to be fractionally wider than it should be... which has the effect of chopping a bit from both side.
I've spent a little time today jigging the styles for mobile but realise I need to spend more time on it, so I'll look at this tomorrow.