Um...not to be Chicken Little, but you might want to check this out.

[katallison]

OK, show of hands, everyone who's been vegging out for the holiday and who was consequently unaware of a major new Windows security hole? ::raises hand::

This is the Windows metafile exploit, as described in a good quick overview and FAQ from SANS. Secunia has rated it as "extremely critical." Looks like it has the potential to be very nasty indeed; I've both installed the unofficial patch and temporarily unregistered the affected .dll, but I'm also going to scale back my web browsing until this thing is resolved.

[Insert obligatory rantage directed Microsoft-wards, and yes, all you Mac and Linux users, I can hear you snickering...]