I use Twitter Bootstrap 3.0-RC1 combining with Modernizr 2.6.2. (the issue is also reproducible with Bootstrap 2.X.X)
I struggled to find why my browser didn't show any scrollbar, traditionally on the right side. (of course I tried to minimize my browser's window in order to see it)
I first found this post, potentially linked with my issue, since I also use the navbar
component of bootstrap.
I find that when I remove the second line of this snippet:
<link rel="stylesheet" media="screen" href="stylesheets/bootstrap.min.css">
<script src="javascripts/modernizr-2.6.2-respond-1.1.0.min.js" type="text/javascript"></script>
the whole works meaning the scrollbar appears.
Is it a normal behavior from modernizr to remove scrollbar regarding some context?