Is this only cgminer related ?

I am getting about 15-20% stales using Phoenix miner (Version 1.6.2). Almost after every "LP: New work pushed" the first share send is rejected. Tried out the new Version (1.7.0) but it drops from 300 MHash down to 200 MHash and does not produce any shares. Read that the new Version seems to be still buggy.

Anyone else having that issue with Phoenix?

So guess i should change my miner, any prefered suggestions ? - Which is most appropriate miner for merged mining ?