As you can see, when I hover my mouse over the "See new questions" button or the "Visit the Help Center" button, the text of the button turns blue. When I hover over the "Ask a question" button, the text stays white.
I was wondering if this was by-design or not, since the blue text on a blue background is quite hard to read.
EDIT: I just found out that the text remains white after clicking the button for the first time. If my theory is correct, then new users will see all blue text on hover, which would make it quite confusing for them.