Suggestion: "Jump to top" button on new layout.
(you knew that was coming)
When I read an instructable, I reach the bottom and usually want to go back to the Instructables homepage. This may not be the flow everyone follows when cruising the site, but it's what I do. The top banner scrolling away but leaving the 'ible info there as a "ribbon" is a neat trick, but I keep expecting to see a link to the homepage up there that will save me from having to scroll all the way back up to the top of the page.
What i'd like to see is a "Jump to top" link, either at the very bottom of the Instructable, or in the "ribbon" where the title and voting, etc. reside. The "ribbon" would be slightly more useful, since I could click it when I reach the comments if I don't want to read them all.
Again, it may just be me, and I'm not asking you to redesign the site just for me, but I find myself noticing it often enough that I thought it might affect other users as well.
Thank you for all you do, editors!