Apple released a JAVA update for Lion.

This update will close a few vulnerabilities that allowed some malware infections over the last 2 weeks.
There is also a JAVA update for Snow Leopard.

http://support.apple.com/downloads/

Suggest you go and get it.

Cheers ... McBie

The Flashback Trojan:
Flashback trojan reportedly controls half a million Macs and counting


Threat Description: Trojan-Downloader:OSX/Flashback.I