I'm using the twitter bootstrap and tweaks are okay except, a white border that sits to the right of the content.
I recommend checking your skeleton for the project first. I've had similar problems with a larger spacing on the right side and the hit was just a few changes in:
<div class="col-xx-xx">
If this issue does not resolve, make sure your project contains:
<meta name="viewport" content="width=device-width, initial-scale=1">
Partially is also one of the most common problems as well. Post your code so we can all simulate your problem and try to solve it more accurately.