I don't know about you guys, but I have a difficult time telling the difference between the blue text of an un-viewed question and the slightly lighter blue text of a viewed one.
Should I just pay more attention, or would there be a better color scheme to help show which questions you've looked at already?
Perhaps a grey color would be easier to make out than the lighter blue.
Here is what things look like for me:
They all kind of blend together.