No matter what Internet browser you use--Internet Explorer, Firefox, or even Opera--there are new security updates available, and it's a good idea to patch your Internet browser today. On Tuesday, April 11, 2006, Microsoft rolled out a cumulative patch for Internet Explorer that addresses 10 known vulnerabilities. On Thursday, April 13, 2006, Mozilla offered a patch for Firefox 1.5 that addresses up to 21 vulnerabilities (most of which were not public before the announcement). Also on Thursday, Opera announced a patch for a vulnerability affecting Cascading Style Sheets. Why is this important? Virus writers sometimes take advantage of the delay between a patch's availability and one's ability to install the updates to release a new virus or worm; security vendor Qualys reports that it currently takes an average of 19 days for half of the vulnerable computers to become fully patched, so that's a window of about two weeks in which virus writers can run amok. Don't be one of the unlucky ones--update your browser today.