I totally agree with Flavie.I have 2.1a operating system on my XD3 and it sucks.I'm experiencing almost all problems written above ,plus I have harmony on all 4 voices although the software allows harmonisation on only one voice in every single program,according to the user manual.XD users don't need new functions,we need software that works exactly as written in the user manual and is 100% reliable.Ketron,hire somebody to write the software for you,if you can't.Please!?!?!