This fixed some persistent crashes on my AutoCAD install – here is the link if you haven’t installed it yet.

It needs to be installed AFTER Service Pack 1.

Direct links copied below:

AutoCAD® 2012 Based Products (zip – 937Kb) (zip – 1011Kb)
Readme (htm – 45Kb)

AutoCAD® LT 2012 (zip – 937Kb) (zip – 1012Kb)
Readme (htm – 45Kb)

Autodesk – AutoCAD Services & Support – AutoCAD and AutoCAD LT 2012 SP1 Ribbon Hotfix