Ya han instalado el Service Pack?
Segun el sitio de Autodesk:
As a result of the detailed information that we received from customers who used the Customer Error Reporting Utility, several problems were identified and fixed. Updates have been made in the following commands and features:
Occasional crashes when using DB Connect feature on 64-bit machines with 4GB and more RAM.
Occasional crashes when opening drawing file when a bubble notification is still displayed.
Occasional crashes when clicking New in the Quick Access Toolbar or the Start Drawing tile on the New Tab page.
Occasional crashes when clicking the New Tab Plus button after adding LayerFilterComboControl or Filter in the CUI dialog box.
Occasional crashes when inserting a block from Design Center on the second time.
Occasional crashes when selecting the "Fully open the drawing file" option that displays when opening a drawing that was saved in the partial open state.
Occasional crashes when exiting AutoCAD.