Not sure if you guys are planning on reworking the Special Categories of attachments or not, if you are then you can delete this. Anyway, I think Quicktime should be added to that list. "mov" files seem to be one of the more popular formats to display video on the web, why no support for it?

After looking at the display_attachments() function, the code on attachment.html, and the ACP attachments module, I thought it would be a quick addition. Sorry if this is considered more of a feature request than a bug report, but I really believe it should be added.