Ah ha, perhaps he meant "framework" in the software engineering/programming sense. The framework would dictate the way the windowing, etc. functioned and they indeed seem to have retained the P4 style interface from what I can gather. If they bolted new stuff onto that framework, I can begin to understand some of the problems. Again, cross-platform framework Mac/Windows easier to do but no OS specific features - bad choice.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken