I'm using Autodesk Inventor 2012 as a part of Product Design Suit 2012 (W7 x64)
After installing Maintenance update SP1 (Autodesk Inventor 2012 - Cumulative SP1 x64) all the keyboard shortcut & alias are disabled.
This has been a tedious problem that I've been having for quite some time, too. The keyboard shortcuts just stop working with no obvious reason.
To suggest deleting user accounts is no solution, Autodesk needs to fix their code.
Inventor 2012 current version, W7 x64
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