TECHNICAL SUPPORT / WEB APPs BUGS

The following pops up in a Windows 7 error popup window

A failed assertion occurs
ProcName: client_ryzom_rd.exe
Date: 2012/12/02 10:13:57
File: Z:\home\nevrax\code\nel\src\3d\driver\direct3d\driver_direct3d_sh ader.cpp
Line: 402
FuncName: NL3D::setFX
Reason: "drv->activeShader (&s)"
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No log
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Running the latest AMD/ATI driver for my card (HD 5800 series)

Any ideas?