Microsoft released updated versions of Internet Explorer for Mac OS X and Mac OS 8.1-9.x systems last night.

Internet Explorer 5.2.2 for Mac OS X offers the latest security and performance enhancements for the browser.

One serious flaw addressed in the release is the "identity spoofing" vulnerability described in a recent Security Bulletin from the company.

According to Microsoft's Security Bulletin, Mac users should also expect Office and Outlook Express updates in future to address the problem. This version of the browser also supports Apple's Quartz text-smoothing feature.

Mac users running older OSs get Microsoft's Internet Explorer 5.1.6 for Mac OS 8.1 to 9.x, which was also released last night. This addresses the same Security Bulletin as described above. It also fixes: "Vulnerabilities that might have caused Internet Explorer to stop responding or caused a memory problem that compromised the security of the computer", the company says.