displaying the squeeze page increases your guest hits in the back office so to put your mind at rest here's a screen shot of my guest hits, the red square is where the page that got changed got defaulted to my id, the green square is where i fixed it.
you can see there weren't any significant changes to the numbers during the time it was not working for custom url's and the screen shot from my prospect page shows no new C prospects coming in during those dates.
Andy