[Mark Dobson] "I suppose, probably naively, anyone who bought plugins for Premiere would be able to transfer the licence over to FCPX should they want to jump ship."
No. Probably not. Plus not all are available on both platforms. Some plug-ins work or are licensed for any/all apps (like MB Looks) and others are specific to the host or API (FxPlug versus AE or AVX). Different companies have different policies for cross grades. They also have different versions in the 32-bit to 64-bit transition.
- Oliver
Oliver Peters Post Production Services, LLC
Orlando, FL
http://www.oliverpeters.com 
