The Lenovo 45K1610 Port Replicator driver, when installed, causes Autodesk Inventor 2011 to crash when opening files. It also crashes the Inventor crash reporting tool, with a logged crash in the nVidia driver. The latest drivers from Lenovo for both the nVidia driver and the Port Replicator do not fix the issue. Uninstalling the port replicator driver fixes the issue. This is on Windows 7 x64 Enterprise.