Do you have any additional 3rd party codec packs installed (other than DivX)?
Nothing other than an AC3 decoder...
What kind of footage are you using in your projects?
Is it material that is converted using Cineform's tools?
How about still images/audio? In what format are they?
Also, have you run all updates to the CS3 suite?
How about windows updates? .Net fixes, directX updates, display drives, etc...
You mention having tried multiple OS' recently. Were those on different machines, or the same machine consistently rebuilt?
By Windows 7, I'm guessing you're meaning the Release Candidate, right?
Can you provide more specs on your hardware?
Most of the footage is cineform files, converted using the latest version of neo scene. But its happened before I've even opened a project or imported any kind of files. Audio is PCM. Sometimes the error will come up and if I hit x instead of "close the program" it stays running just fine, other times it will close.
Adobe updater updated everything by itself, know it updated all the core programs, etc. (using Production Premium)
Every available vista update is installed including service pack 2. Latest nVidia drivers, etc. I ran spybot and antivirus software today.
All the OS were on the same system but the HDD was completely formatted inbetween installs. Yes W7 RC was used.
Core 2 Duo T9300
1 internal 320GB HDD
1 external esata 1TB HDD
Blu ray read + write drive
I have a feeling it could be something to do with Cineform but what and why?
It just happened when I tried to open Encore and crashed before the program even started with this in the details:
Problem Event Name: APPCRASH
Application Name: Adobe Encore.exe
Application Version: 126.96.36.199
Application Timestamp: 46cf7628
Fault Module Name: libguide40.dll
Fault Module Version: 4.0.2007.602
Fault Module Timestamp: 4661a089
Exception Code: c0000005
Exception Offset: 000133f0
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 1033
Can you try uninstalling Cineform, then use the appliation with other source files you may have at hand and see if it stil crashes? If it does, re-install Cineform as it's most likely not the culprit.
Another user was having problems with Cineform a couple of weeks ago, and he managed to fix it by uninstalling it and re-installing again. Sometimes there are remaining components left from previous versions.
It won't hurt trying, if only to rule it out.
This may be a shot in the dark, and I know you're not using a Mac, but I recently saw this article pertaining to the 8600M.
Perhaps you should try rolling your driver back to a known safe version to see if it resolves the issue.