A way to cause Safari browser crash

Being engaged in experiments with HTML and CSS, I found a way to remotely close the user's Safari browser.

Simply opening the page with the following code just crashes the browser, with it in both Windows XP SP2 and MacOS X Leopard 10.5.5.

<style>
wbr { position: absolute; }
</style>

<wbr />

The bug manifests itself in the latest version of Safari (3.2.1) and in previous versions (at least 3.1.2).
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See in practice here: grinchik.ru/side/crash-safari.html