I'm considering upgrading my app from Ext 4.0.7 to the latest version 4.1.3. This is primarily because of some grid scrolling issues and performance problems I'm having in 4.0.7.

Just swapping over the version of Ext didn't seem to work well - a lot of errors! I was just wondering if anyone else had been through this process, and what problems I am likely to encounter. Also, I'm wondering how much faster the latest versions of Ext actually are - is it worth putting in the effort to upgrade?

Thanks in advance for your help!