title: Dotted border on table cells turns solid
body: <p>I've set up a [jsfiddle][1] with my test case.</p>
  
  <p>Basically, I have a table with a dotted border on the bottom of some cells and a solid border on others. For some reason, the dotted borders are turning to solid ones on some cells, I can't figure out why. Could anybody explain this behaviour and/or provide a fix for it?</p>
  
  <p>I'm using Chrome.</p>
  
  <p>[1]: <a href="http://jsfiddle.net/eZcSR/1/" rel="nofollow noreferrer">http://jsfiddle.net/eZcSR/1/</a> <code></code></p>