Happened two weeks ago, Linux too
This happened to me on July 29th while browsing technology and news sites (so nothing I expected to be particularly dangerous) with Firefox 2 and Linux. I then pasted the link, I saved the AV2009... file and tested it with an online virus scanner. It tested negative. The day after, it tested positive.
At the time I could not find information about this on the web, but this exact attack has been in the wild for at least two weeks.