Glyphicon changes height of input group addon
Created by: bassjobsen
<div class="input-group input-group-lg">
<input type="text" class="form-control" placeholder="Username">
<span class="input-group-addon"><span class="glyphicon glyphicon-star"></span></span>
</div>
Shows in Firefox (23.0 for ubuntu) the span.glyphicon 1px to height, see:
Setting @padding-large-vertical
to 9px will fix this issue. This possible cause many other issues.