Firescrolling - Firefox Vulnerability POC

As many of you know, Im into the whole security vibe and tend to keep a close eye on such matters. This vulnerability, over at mikx.de, caught my eye as its for Firefox and DOES work in Linux or Win32. The POC works by combining a couple of Firefox exploits with a bit of Javascript and XUL, with very worrying results. (the POC it drops a text file in the home folder of your system but it reports that it has full XPCOM access). This is not good, not good at all.