Do you use the --shaders option?

If yes, please try it first without. Then you should get the same hashrate as before (this is a check if everything works fine with old cgminer intensity).
Afterwards you can use --shaders again and try to increase intensity (if you are not already at 20).

Let me know how it works.
During my tests with the new intensity my 5770 does not like intensity 13 (only 62kh)
I 12 (76 kh) and I 14 (83 kh) are much better.
The 7950 has the same behaviour as before / slightly better.