The actual source code that is output is:

          <a class = "titlebar"
             href  = "index.pl"
        >
[download]

So what "view source" is telling you

<a class =" titlebar"
             href  =" index.pl"
        >
[download]

looks like the standard Mozilla-based breakage of munching the source code before it shows it to you in "view source". And it looks like the extra spaces are compressed badly and inconsistently. So I've taken out a ton of whitespace (sorry, Petruchio) and we'll see if the problem recurs.