If you own a Mac, you should either disable Java or Install the patch from apple before too long. The Flashback Trojan is in the wild and spreading.
To get the fix , go here: http://support.apple.com/kb/HT5228
to find out if you have been compromised, go here: http://www.f-secure.com/v-descs/trojan-downloader_osx_flashback_i.shtml
The Java vulnerabliity was patched some time ago, however, since apple controls how patches are installed, you had to wait till it was available in system update. It took Apple 8 weeks to release the fix from the time Oracle released the patch.
Read more @ http://www.bbc.co.uk/news/science-environment-17623422