Don't expand urls that aren't shortened

On digg.com, links that point to regular digg pages (not the new short url service) get treated like short urls and the tooltip appears. I replaced the line

tooltip(data.long_url);

with

if (anchor.href !== data.long_url) {
tooltip(data.long_url);
}
else {
tooltip(false);
}

The code ignores the link if the original is the same as the shortened (when pointing to a non-short url) and removes the exisiting tooltip.
There might be a better way to go about this since the tooltip still appears saying "Expanding..." but this is the best I came up with off the top of my head just now.
Other ideas were to ignore the link if it was longer than a certain length or to use a regexp to determine whether the link points to a regular page or a short url.
It's not a huge problem but it's still a minor inconvenience to have tooltips popping up everywhere and it should be a reasonably easy fix.
Good work so far!