Difference between SoapUI 3.5 and 3.6 version

Hi Guys,
I wanted to know the major difference between soapUI 3.5 and 3.6.
Also i have scripts created in 3.5 which runs smoothly. I wanted to know that if i run it on 3.6 version will it give me any problem or will it run fine.
Thanks,
Sumit.