It occurs to me that I don't know whether you intend to support IE 7. But anyway, since FF is giving me problems today for unknown reasons, I am using IE 7.
My code blocks were showing an extra unneeded CR at the end, so I decided to try using the
<pre> tags I've occasionally seen used instead of indenting. When I typed the opening
Try it to see what I mean. If you have trouble replicating it on a different answer, here's the one I was editing.
Update: I duplicated this problem on another IE7 machine, Ctrl-F5 did not clear it up. An IE8 machine did not have the problem. Firefox 4 does not have the problem.