The problem remains when outputting an icon to a browser control. As the \icon text macro doesn't work on browser control as stated in the DM Reference, ad it leads you to use browse_rsc() instead, it seems to be an icon flickering when you access the page:
Sometiems shows a single icon, and sometimes shows the entire icon movie.
mob/Login()
src << browse_rsc('MyBaseIcon.dmi',"base.png")
src << browse("<img src=\"base.png\">")
Constantly relog and see how sometimes the icon shows the entire movie.