What if SmartReflex and UC+OC-kernels (125 Mhz - 900 Mhz) are used at the same time? Any problems?

And would think both vddr1 and vddr2 means different things, so activating only one may do something already?
(Nope, have not read this http://focus.ti.com/pdfs/wtbu/smartr...whitepaper.pdf)