Leopard won't encrypt disk images

[Harp]

I made a smaller post of this here:
http://macosx.com/forums/mac-os-x-sy...ml#post1421180

I just got 10.5 and I've been subsequently testing it in my own way (much as the raptors tested the fence in jurassic park) and I've had a problem getting my disk images to encrypt.

I go into disk utility and create a new image. I name it and tell it to encrypt (either 128 or 256 - same result) then I traditionally choose a large size and make it sparse (although I get the same results basically however I set it up.)

Then I create the image and give it a password.
The image is mounted on my desktop. I eject it.

Then, whenever I go to remount it, it never asks me for a password.

God knows what I am doing wrong. Could this be possibly another bug in the disk utility, alongside the now infamous repair permissions? If I'm an idiot, someone please let me know.

Thanks.

[fryke]

Have you tested it with another account or computer? I don't mean the creation, but mounting it. Create a secondary account on the computer and try to mount a disk image you've encrypted in the first account. Maybe it just automatically saves the pw to the keychain (which it shouldn't unless you say so...).