Looks like @yangshun's refactoring of button styles [caused this](https://github.com/cvan/galaxy/commit/5fbce1f3b704d2087026e3e710ddd8c48da24fc6). Change [these lines](https://github.com/cvan/galaxy/blob/master/src/templates/confirmation.html#L4-L5) in `confirmation.html` to use `btn` instead of `button` as the class for those buttons and it should fix the styling issues. I'm not sure they should be `button` elements either, but changing that may not be necessary.