Hi,
I had a dynamic chart which was working well in previous version 2.1.9. However, same chart with exactly the same code has animation (or rendering) problem in new version.
Please see the samples:
Using v2.1.9: (since I couldn't find the resource file (highcharts.js) online, I pasted it just before the sample)
http://jsfiddle.net/6HBPs/2/
Using v2.2.0:
http://jsfiddle.net/7VX9C/2/
Thanks