Dude, Chris, Kriesi,
Please take a look at my website http://www.inseeds.com and select the "questions" or any other longer page menu tab. Scroll down to the bottom of the page and change to the next image with the image scroll at the bottom and watch the menu bounce up and down with each image. If I lock the menu with your provided code, then when on a smaller resolution screen (laptop), the bottom menu selections can not be seen nor selected.
Simply, a menu that is not locked consistently would resolve my problem. Ideally, I would like a menu that scrolls up and down to see every selection and then stops at the top or bottom of itself while letting the pages continue scrolling. Is there a way to only scroll the main menu to it's top and bottom (from the logo to the social media buttons) and have it locked within those parameters, that would be Golden!
Also, it doesn't seem like this theme is very smartphone friendly so perhaps I could use one of your simple smartphone themes. Is there a way to have a default mobile theme load while on a smartphone?