Try refreshing the post link form page next time you post and it should work. The title was populated for me when I used this link - but only after I refreshed the page.

I believe the browser is caching the old version so you didn't get the update. This is still a no bueno but a different no bueno - looking into it.

Rather than swapping the fields, I'll make the URL field get focus first rather than title - effect is the same but keeps it consistent with the "Discussion" posts.

Good idea!

I think I know why that doesn't work on their site - a quirk of how they render their page (they change the title after the page is downloaded). I'll see if I can work around it because lots of sites do this.