[R] Sweave and transparent PDF?

[Benno Pütz]

Hello,

I have run across the following problem:

Creating PDF files manually by using

pdf(version=1.4)

I can make graphs using the new transparency feature of R2.0. If, 
however, I try to create the same graphs with Sweave, all transparent 
stuff is gone. This os likely due to the default version parameter in in 
pdf().

How can I tell Sweave to use the newer PDF version? The parameter seems 
to be hard-coded (not via some option) and I could not come up with some 
kind of hook ...

Thank you

    Benno