SHORT SALE TAX IMPLICATIONS

I moved for work over 4 years ago I bought a home in the new location last year. I finally short sold my prior primary residence. Has anyone else been through this do they hit you on the taxes. I know they have the program going till 2012 for short sale tax forgiveness but it says on primary residence. my prior house was my primary residence until i moved and i could not get it sold finally it has. any thoughts let me know