OpenGL Driver Crash on Lenovo T61

We are experiencing an intermittent crash in the OpenGL driver on the Lenovo T61, Intel 965 chipset. Windows XP professional, Service Pack 2. The crash is quite specific to this Lenovo; the same code does not crash on other machines (by other manufacturers) that we use in large numbers. All we have for a stack trace is:
Stack trace:
(0) : ig4dev32.dll at ?().
Module Info:
ig4dev32.dll, Date: 8/8/2007 4:46 PM, Ver:

Has anyone experienced this or can you point me to any resources that might help?

Many thanks.

Its hard to debug your code from the information you provide, its always nice with reproducable bugs, perhaps you could cook a minimal example showing the crash?

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