I have accidently deleted the Quicktime Plugin file under HD\ Library\ Internet Plug-Ins\ Quicktime.plugin.plugin.
Do you have any idea how I can restore this? Safari (5.1.7) Help\ Installed Plug-ins does not show Quicktime as one of the components.
Have you tried re-installing Quicktime? Download quicktime again and run the installer, the plugin should be installed again.
Retrieving data ...