In the course of the US government's antitrust case against Microsoft, Apple Senior Vice President Avadis Tevanian testified that Microsoft specifically sabotaged Apple's QuickTime software, preventing it from playing certain types of multimedia files embedded in Web pages. Not so, says Microsoft. It hired independent software testing labs Mindcraft and Sax Software to get to the bottom of the conflicts with Internet Explorer. Both confirm that the problem lies with errors in Apple's own QuickTime installation program. The Mindcraft site (www.mindcraft.com/qtfix) explains it all and offers several different patches that vanquish the problem.