Acrobat built in preflight problem

[saint]

I have encountered a problem when using the built-in Preflight from Acrobat Pro 9.4.5
I am using the built-in setting "Sheetfed Offset CMYK" from acrobat.
Everything works well except it is compressing the files.
It is only a problem if there is any "Raster text" in the file. It is adding noise around the type.
If you have a flat tiff file with a white background and black text, the preflight setting adds noise (fuzz) around the black lettering.
I have started stripping everything out of the Preset but still have not been able to get the noise to go away.
Ideally I would have Uncompressed files after the "preflight"

I know that type should be vector but you can not always get this from you clients.

Any suggestions outside of buying another program?

 

[impression]

You should be able to make your own custom version of that preflight spec. You can turn off the various preflight functions you wish to skip.

 

[mattbeals]

You can customize (by duplicating) the preflight settings and change the image resample parameters to use ZIP or FLATE compression.