List of Resolve Issue for AutoCAD 2012 / 2013 / 2014

All user, All Autodesk Team,

I am looking for a list of all issue / bug / crash resolve by version of AutoCAD from 2012 ro 2015.

We use currently AutoCAD 2011 and we are looking to upgrade for a new version BUT we have got many bug in AutoCAD 2011 then I need to know and to be sure about the choice.

For example, DIMSTYLE command after editing some parameter and click OK, the ACAD 2011 crash. This is one example.

I have try 2013 & 2014 and see that HATCH give some issue, not respond correctly.

Can you give me a feedback and advice about the best choice ?

Thanks to all,