Installed Leopard --> Boot Camp selector disappeared

In Mac OS X Tiger I had Vista installed via Boot Camp. This partition was also hooked via Parallels, so I could use Vista either "raw" or virtual. Very handy.

Then I upgraded to Leopard. Vista works ok with parallels, although gives strange exclamation about "ejecting vista". But what doesn't work is the boot camp selector. It's gone! When I boot up the computer and press alt/option, nothing happens and Leopard boots up.

Vista is there and working because it works from Parallels. And I can see the 35 gig Vista partition with disc utility. Running Boot Camp Assistant wont help since it doesn't see the existing boot camp partition....

How to tell OS X that: "Hey, you've got a Vista installed via Boot Camp. Show it up in boot camp selector."?