I've upgraded to the latest version successfully in every respect except that I am no longer able to cancel an individual or group registration from the front end. I can change the status on the backend to cancelled. but that does my registrants no good.
I've looked at every configuration setting, tried turning the jquery on and off, nothing seems to be working.
Could you please explain more details ? Where do you cancel the registration ? If it is possible, please submit a support ticket sending me admin and FTP account of your site so that I can check it for you !