protools9 plugins strange behavior

[tobias bluth]

today i upgraded from pt8 le to pt9.put on a session and fiddeled around with it for a while.after i inserted a few plugins i noticed a change in sound even when the plugs doing nothing,then i bypassed them and again they gave me an altered sound to the original signal(like phasing with a midrange focus).i then switched of adc but nothing changed.it dont happen with all plugins but it seems that my waves plugs do the trick,especially c6,c4,ll3 multi,ll3 limiter,at least until now(havent tried all my plugs yet).finally i have to say that this never occured with pt vers.7-8 .any ideas anyone.thanks