version api 0.5 and 0.6

I have an aplication that it downolad a xml file from web, and then it transform from xml to .svg with XMLStartel and after I use Inskape for getting a png file. That worked good but when the api version change from 0.5 to 0.6 , it give problems.
I believe that the problem is the style sheet file has changed and it give other rules.
what is the problem? Do you know if there is other style sheet file?
thank you