An IMDb link for a film, by default, looks like this: http://www.imdb.com/title/tt0258038/
If you click on "Full cast and crew" from that page, it'll look like this: http://www.imdb.com/title/tt0258038/fullcredits#cast
If you're logged into IMDb and you set in "Site Preferences" the option to "Display full credits", all film links will look like this: http://www.imdb.com/title/tt0258038/combined
When pasting in a link like this at the Release Group level, using the Relate to URL feature, these URLs are correctly determined to be for the edit "Has an IMDb page at". But the cruft at the end should be automatically removed.
Is the order always http://www.imdb.com/title/tt0258038/ plus more stuff? Or are there any cases where there's something else in the middle of that? (between title and ID or whatever)
As far as I can tell, the URLs are always formatted so that the extra information is at the end; I've never seen anything between the title and the ID.