I’m having this problem too, after linking to a .mov file. I didn’t even know wtf was going on until I googled “wordpress enclosure quicktime”. This link was helpful for explaining what was happening, but I don’t really care what happens in my RSS feeds (not sure anyone even uses them) but what I do want to do is remove the bit it automatically adds to the end of my post:
enclosure: https://blahblah/blah.mov 41509080 video/quicktime
I have the same issue as allthetime – I can’t delete the custom field that WP adds the enclosure as.
I understand what’s happening, and what WordPress is doing, but is it necessary to add this (useless imo) info to the actual post as well as the RSS feed? There doesn’t seem to be any option to turn it off, but if someone wants to point me to the right file I’ll see if I can hack it to stop it displaying.
And Lorelle – it’s not part of the site or a Theme, it’s a built-in function of WP.