Which browser do you use?

firefox 17 something

If the navi doesn't appear fixed in the top right corner, then there's really a problem with the css.

Hmm, maybe its not being loaded?

I'll try loading it explicitly with

javascript:(function(){
    $('<link rel="stylesheet" type="text/css" href="https://raw.github
+.com/perlpunk/mytools/master/perlmonks-js-css/perlmonks.css" >').appe
+ndTo("head");
})()
[download]

Aha, its not being loaded , finally provoked a message Error: The stylesheet https://raw.github.com/perlpunk/mytools/master/perlmonks-js-css/perlmonks.css was not loaded because its MIME type, "text/plain", is not "text/css".

update: apparently this is a feature not a bug, and apparently also its abuse to use raw.github like that, so

So, if you could post/publish/maintain a version of the latest js/css in <readmore><c></c></readmore> in the root node for example, and then perlmonks can link to it (with first code tags (abspart=1) being the JS and second(abspart=2) tags the CSS) like this

javascript:(function(){
    $('<script src="?;displaytype=displaycode;node_id=1048124;abspart=
+1"></script>').appendTo("head");
    $('<link rel="stylesheet" type="text/css" href="?;displaytype=disp
+laycode;node_id=1048124;abspart=2" >').appendTo("head");
})()
[download]

This way of linking is used for css all the time on perlmonks, example themes for Anonymous Monk or try out themes without changing display settings

Firefox likes it, there is no http/https/mimetype to complain about :)