Invalid XHTML generated by String.link()

overlay-parent.js's Drupal.overlay.redirect() function uses String.link() to generate an anchor tag. This function produces invalid results, particularly when given a URL with invalid entities in it:

js> var url = 'http://ohnopub.net/?test&blah';
js> print(url.link(url));
<a href="http://ohnopub.net/?test&blah">http://ohnopub.net/?test&blah</a>
js> quit()

ohnobinki@ohnopublishing ~ $ js --version
JavaScript-C 1.7.0 2007-10-03
usage: js [-PswWxCi] [-b branchlimit] [-c stackchunksize] [-v version] [-f scriptfile] [-e script] [-S maxstacksize] [scriptfile] [scriptarg...]
ohnobinki@ohnopublishing ~ $ 

I can see the same behavior in my browser, resulting in a DOM exception when browsing to a page with a fragment in it:

Error: not well-formed
Source File: 
Line: 1, Column: 106
Source Code:
<div xmlns="http://www.w3.org/1999/xhtml"><a href="http://ohnopub.net/drupal/node/6#main-content=&overlay=node/6/edit">http://ohnopub.net/drupal/node/6#main-content=&overlay=node/6/edit</a></

is produced when clicking the Edit link and starting out from http://ohnopub.net/drupal/node/6#main-content (column 106 is at the equal sign in of &overlay=. Also, I have to specially wire up drupal with Content-Type: application/xhtml+xml to get these exceptions).

Also, Mozilla's docs state that String.link() is non-standard.