CS3 PNG reading/writing failing on very large network volumes

We are experiencing an issue with the built-in PNG file format plugin, that is consistent across multiple versions of OS X on fully-patched CS3 Design Premium. I'm hoping to hear that others have seem something similar.
We recently deployed a 1.8TB network drive via Windows Server 2003. Since then we cannot read or write PNG files, not even a preview through the file dialog, without hanging the CS3 application interminably. We have done our testing in Photoshop and Illustrator. The same occurs opening a file directly from the Finder to these apps. We are connecting to the server via SMB. All other file operations function properly with every other format. Working with PNGs outside of the Creative Suite works fine.
It is definitely isolated to PNG. We have tested exactly the same file on a sub-terabyte volume on exactly the same file server and the PNG files opened and saved as expected. It is only on the large terabyte+ volume that it exhibits these issues.
There is no recovering from the error. The application beachballs and never returns to activity, no matter how long one waits.
We have tried an alternative PNG plugin to ensure it was not some kind of special cross-platform metadata needs that somehow occur under the hood for this file format. We have tested SuperPNG as a replacement and this functions as one would expect, opening and saving files properly and without issue.
Has anyone else seen this? We don't have drives this large locally on any of our machines that we can test this outside of the network environment.
We are running fully-patched Creative Suite 3 Design Premium on G5- and Intel-based Macs running a mix of 10.5.x and 10.4.x, all regularly updated.
I look forward to hearing anyone else's experiences with this setup.
Thanks!
Greg

Buko--
Thanks for the response. However, I would hope that issues relating to incompatibility would be one way in which products grow over time.
I think it is fair to think that Adobe can be responsible enough to allow file formats to work on server volumes. No computer is an island, especially today.
I have found a workable solution, and I am not here to fix a bug or complain to the world. I'm here in a discussion group to spark a discussion, as certainly I understand that this is not the forum from which to expect technical support.
I remain interested in others' experiences.
Respectfully,
Greg

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Database Table Reading Stuff.zip ‏119 KB

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Message was edited by:
ninjarob

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Still lost in code, just at a little higher level.

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