Well obviously they both think they have something, and they probably both do, the lawyers who design contracts make them obscure and open to interpretation so that they can make more money defending them when the time comes. It's like selling light blubs that don't last forever.
Castle say they own ROS, ROL say they don't, money isn't exchanged as excepted by one party.
If ROL thought Castle owned ROS why would they mention Pace?
I like how ROL talk about owners of ROS being E14 and Pace, and then the sub licences being Castle. Sneaky.
"Castle's ongoing disputed use of RISC OS in the Iyonix PC" and "benefit of all the companies in the RISC OS community (not just one)" are good too.