I've been working on a in a Bootply sandbox all day and encountered an issue when moving the identical code to a live server.
The sandbox is here and the affix works fine: http://www.bootply.com/wu2vXxkt5o#
On the live version I get the error and it refuses to load the elements (the three images)
TypeError: $(...).affix is not a function
http://nathan97.com is the live site.
The code in question:
/* activate sidebar */
$('#sidebar').affix({
offset: {
top: 235
}
});