visit the link in my signature. there you could find the SVN link to sources of richfaces-demo.
I am having to give this up for the moment.
I was trying to tack this on to an existing project and it is hard to isolate where there might be a problem and I need to move on.
Back to tomahawk datatables for now.
Unfortunatelly it's not easy to help without any details and code samples and just "not works" description. Update us with details if you will return to this.
Quick update, in case anyone hits similar issues.
My backing bean in request scoped and the init refreshed the array that is used for my rich:datatable.
It is possible that this is causing the sortBy not to work. I still have to dig a little futher.
I added an a4j:keepAlive to the page and it now works as expected.
I was so convinced it was down to a tomahwk richfaces incompatability it took me while to nail down. That and the original code I inherited was using a t:savestate.