Timing problems with AU Ivory Piano + ESB and Logic 7.2

Question

I have problems with Ivory and Logic 7.2:
The Ivory (AU version 1.50) plays well in tempo, but when I want to bounce (export track as audio file) the Ivory plays totally out of tempo.
Even when I touch the record button on audio tracks or when I want to record my mix on 2 audiotracks, the Ivory plays out of tempo.
Even freezing the Ivory track gives the same problem.
Then I need to go back to my last saved version.
The same actions with Emagic, Native Instruments and Spectrasonics AU plugins, and everything works fine.
I throwed away already the Ivory prefs, no positive results.
My Ivory sample files are on a separate 400 GB internal disk, and my Audio I'm recording on a external Glyph disk.
I think I have this problem since I've upgraded from Logic 7.1.1 to 7.2 but I'm not sure. I didn't worked long with Logic 7.1.1.
I don't work in Protools, but I use the DAE and Direct TDM (no Core Audio)
It happens in the most simple application: no DAE or AU plug-ins, only one Ivory AU plug-in.
This is my configuration:
Ivory AU (Audio object-Direct TDM-Instr) output ESB 1-2 -> input ESB1 2 (Audio Object-DAE) -> Output 1-2 of my digidesign interfaces
Ivory becomes totally unusable for me this way. Is someone having the same problems?
Suggestions?
Wim Claes
Setup
Logic 7.2
Protools 7.1cs4
192, 2x96i, 1x 96 interface
G5 dual 2,7   Mac OS X (10.4.3)   4 GB RAM

Answer 1

I tried already a lot of things, but it is very clear:
1. Instantiating Ivory as AU- Ivory plays in tempo
2. Record enable an audio track in the arrange window - Ivory plays out of tempo
This happens with the default song of logic, no other plugins or AU-instruments are instanciated.
I can not find a way to convert my Ivory-midi to audio without the timing problems;
Bouncing, freezing, record to audio, export as audio file: all those things result in timing problems.
I tried this all with emagic plugins (ES2...) and Native Instruments plugins and then I don't have the tempo problem