Are you referring to the blocks on the side? Keep in mind, iterative design.. those are easily added/removed, but to start we've attempted to standardize the sidebar across the site.
Yes, those.
A few complaints about really high resolutions. These resolutions are not normal and admittedly got less attention - our traffic in this resolution range is < 1% with 1600px width being the most common. We went with a fairly web standard 1200px content width with sidebar, so if the sidebar doesn't show then it definitely looks worse.
Meanwhile, considering ways to retain the design aesthetic while accommodating larger screen resolutions.
Some pages, like the forum index, will undergo more changes. But we wanted to get the design out so users can become familiar with it before we made even bigger changes to frequently used pages.
Make the sizing dynamic. The new design might work great on a mobile browser, but it doesn't work at all on a desktop. It should resize to fit the window. It is my choice to have my browser window maximized and I do so so that I can see more content.