Q: vertically center span (bootstrap label) together with other elements I'd like to use the inline labels of the bootstrap css framework:
<span class="label">Default</span>

Unfortunately these labels are not vertically centered when used together with other elements. 
<p>
  <span class="label"><a href="#">test</a></span>This is a test heading.
</p>

Please see the full code for a visual example: http://jsfiddle.net/kvPpm/
I am aware of the line-height and absolute/relative positioning workarounds but was not able to apply them correctly.
How can I vertically center these labels?

A: Since <span> is an inline element by default you can just do:
span { vertical-align: middle|top|bottom; }

And it should work. http://jsfiddle.net/kvPpm/1/
But then <a> inside <span> is not semantically correct. You can just use <a> and style it display: inline.
http://jsfiddle.net/kvPpm/3/

A: .label { vertical-align: top; } 

This worked for me when I wanted it to be aligned properly in a ul
