[any ANONYMOUS forum user]

I think QT also tries to do Flash (SWF, at least. The last version that worked with Win98 is probably too old for someone to have added the FLV filetype).

Go into the Quicktime Control Panel applet, and look for the MIME settings and filetype extension settings, then uncheck any instances of 'Flash,' if they're there. Then, uninstall and reinstall Flash, if necessary (only if the browsers don't pick up Flash
properly after disabling Flash support in Quicktime).