I just tried it and it worked (Omnigraffle Pro 5.2.2 on Snow Leopard MP & MBP), though I was prompted for a password in order to install it in my Stencils directory. It turns out the file permissions were set to read-only on the downloaded file. I changed the permissions to read-write and uploaded a new version, so give it another shot.
Brian Ehret on Page Thumbnails for UI Design — over 1 year ago
I just tried it and it worked (Omnigraffle Pro 5.2.2 on Snow Leopard MP & MBP), though I was prompted for a password in order to install it in my Stencils directory. It turns out the file permissions were set to read-only on the downloaded file. I changed the permissions to read-write and uploaded a new version, so give it another shot.