Patch MS06-042, a fairly comprehensive fix, plugs multiple holes in Internet Explorer 5 and 6, several of which could allow for remote code execution.
However, there is one rather specific problem.
If you are using both Internet Explorer 6 with Service Pack 1 on either Windows XP with its Service Pack 1 or Windows 2000, Service Pack 4, IE could suddenly crash while trying to access a Web page using the HTTP 1.1 protocol.
Support for Windows XP Service Pack 1 will end in October.
The spokesman said Microsoft will reissue MS06-042 next Tuesday and encourages SP1 users to update when it's available.