cross development problem

FROM : Thomas Bauer
DATE : Mon Jul 17 23:22:09 2006

Dear list,

I am developing a project (using 10.3 APIs exclusively).
I have already been testing it thoroughly on intel macs and ppc 
machines in 10.4. without any problems occuring.
However - surprisingly - the application is completely unstable in 10.3.

To be able to create a universal binary I build against the 10.4u sdk.
I have set the deployment target to 10.3.
I have cleaned everything several times.

Here are some examples concerning the instabilities:
The application for instance uses the DRFrameworks "DRErase".
In 10.3.9 the program always crashes after the erase has finished 
producing a crash report complaining somewhere in core-foundation.
It also crashes sometimes after a successfull burn - same kind of 
crash report.
A class using carbon functions does not work at all, I have not 
looked into the reasons in detail.
I have tried a clean installed 10.3.9 and another machine, so the 
10.3 is ok.

All this gives me the impression that something must be wrong with my 
compiler settings
but besides the settings I mentioned above I do not know of anything 
else to keep in mind.

Can anyone please give me a hint or a recommendation how to proceed?

thanks and kind regards
Thomas