I’ve seen it all to many times; my editors make “URL” links to internal content, where they should have used “Content”. Oh, the 404s after content restructuring…
This could so very easily have been mitigated by switching the Link type tabs around, making “Content” the default when inserting a link.
Please consider swapping the “URL” tab for the “Content” tab. I believe this will make it easier for editors to make the right choice when inserting links, whether they are inserting internal or external links.
Also Tom, in order to make the vhost-based autodetection, we first have to specify a default vhost for a site. When this is done, we can certainly look into something like that.