Just to let everyone know.
In Rampage make sure you have the rotation
area to "best fit". This will take any landscape image to rotate
to portrait yet still keep all your portrait pages to remain portrait.
I'm running 10.6b10 and don't see that option to rotate best fit when using the PDF trap engine. It's only available using the old ps workflow that flattens transparency. Has it been added in version 11 to the PDF trap engine?