Navigation menu looks terrible, should be removed upon theme installation or styled

Go into the block configuration for the Seven theme, and remove the navigation block.

Yeah, I agree. But really, you shouldn't need the navigation block enabled if you are using seven. The theme has no sidebar regions, so there is no sensible place to put it anyway. You just need admin_menu, admin, toolbar or something like that.

As a kinda fix, I think that the the seven theme should disable all block when you first enable the theme. And/Or we make it so that if you do enable some block such as the navigation menu, it at least displays ok so that people like you aren't baffled by it! Clearly some css issues. But, the modules CSS is way out of sync with the D7 theme anyway, so hoefully when we manage to re-sync it up, the css issue should resolve itself. Here o hoping anyway!

This should hopefully be "fixed" ...it just puts the menu below all the content, and it actually looks like a normal nested list instead of the craziness that it used to look like. Not sure what else we can do here, but if you can think of something, just re-open.