Hi, I used your guide and it was really helpful, the only problem is that the affix won’t change to affix-bottom when I arrive to the end of the page. I thought that it might have been because I didn’t have a footer, so I added one but still not working.
Here is a demo of my site : http://2015.igem.org/Team:EPF_Lausanne/Test
As you can see, when you scroll to the end of the page the sidebar won’t stop. you can also see the css here if you want : http://2015.igem.org/Team:EPF_Lausanne/Test/css?action=raw
Thank you for your time and this great article !
Axel