The style of duck.co always bothered me: the bar at the top and various buttons everywhere makes it seem old, like windows vista.
Here are some things that we could improve:
1. We can change it to the duckduckgo color scheme
2. Remove the gradient, so the themes would match Windows 8.1 and OSX Yosemite and the new DDG
It would help because users coming to Duck.co would think that it is 'not official' and might leave, thinking it is some ad.