I\'m migrating to bootstrap 3.0.0 and I\'m having issues with an affixed menu to the left: as soon as it becomes affixed (after 10px scroll), its width changes. In this fiddle i
had the same problem once (only in BS 2.3.2).
Not an answer, more a hack: I gave the affixed element a width. That sucked, because i had to set width for all resolutions (RWD) and actually the value should be standard column width (e.g. .span4).
Yes: position: fixed
takes the element out of the given context (in your case col-md-3
).