Not a Mudquirk, but a relevant reminder to naive users. (or those in a hurry - been there!).

If you construct a blickie using this construct <A HREF=www.doovery.com>doovery.com</A>

HTML/Browser thinks the URL is pointing to the domain you are currently on. ie Mudcat

it needs the correct protocol - "http://" or "https://" to prevent a broken link. Depending on the original URL (address)