The following defects have been fixed:

.NET API

• .NET applications built for AutoCAD 2010 may not run on AutoCAD 2011.
• When opening multiple drawings, the minimize and maximize buttons may not always be visible.
• You may experience a random exception when loading custom ARX applications.

2D Display

• When using Software Acceleration, AutoCAD may become unstable.

3D Cache

• When VSINTERSECTIONEDGES is set to “0” Camera preview can be extremely slow.  

3D Modeling

• AutoCAD may become unstable when stretching along the Z axis of the Gizmo.
• Using the Gizmo grip on a 3D model may not work correctly from the right-click menu.

3D Navigation Tools

• Navigation Bar tooltips may cause AutoCAD to become unstable when switching between drawings.
• Clicking on the “X” to close AutoCAD may fail if the drawing is maximized, and both the ViewCube^® and SteeringWheels^® function are enabled.
• Orbiting 3D models does not degrade when Adaptive Degradation is checked in the Performance Tuner and uses the 3D Connexion device
• AutoCAD may become unstable when using the Look tool in the WHEEL command.
• AutoCAD may become unstable when using 3D Orbit in degradation mode with 3Dconnexion devices.
• AutoCAD may become unstable when using the Walk tool in the SteeringWheel feature with degradation and when FPS is set to a limit of 30.

Annotation Scaling

• Drawings containing 100 or more annotation scales cannot be reset.

ARX

• Third party applications may fail when using "removeCmd" in custom ARX applications.

Attributes

• Multiline attributes in a dynamic block created in AutoCAD 2011 may not display in AutoCAD 2010.

Command Line

• With Dynamic Mode set to “0” you may not be able to input Japanese or Chinese characters at the command line.

Customer Involvement Program

• AutoCAD fails to start due to Customer Involvement Program on Windows 7 workstations with Windows 2008 Server on the same subnet.

CUI

• When an Enterprise menu is loaded, the Workspace control in the CUI  Editor may be grayed out.
• Unable to copy and paste toolbar controls in the CUI Editor.
• When switching profiles that point to a CUIx file that cannot be found, AutoCAD may become unstable.
• When using "^P" in a macro, the MENUECHO is not displayed properly.

Digitizer

• AutoCAD will display a CER (Customer Error Report) dialog when exiting AutoCAD with a digitizer configured.

DGN Support

• DGNIMPORT command may not work with the option to ignore external references.

Dimensions

• Some AutoCAD Mechanical objects cannot be selected after being inserted as a block and exploded.
• AutoCAD may become unstable when using eTransmit on drawings containing multileaders.

Display Acceleration

• AutoCAD may become unstable when a password protected screen saver displays on the screen.

Display Drivers

• May have issues updating the Graphics Card drivers on Windows Vista or Windows 7.
• Some display drivers may show up as certified even though they were not certified.

DWG

• WBLOCK may be unable to save the drawing to the AutoCAD 2000 file format for “DWG” and “DXF”

External References

• AutoCAD may become unstable when an External Reference is reloaded after XOPEN, EDIT, or SAVE.

Graphic System

• AutoCAD may become unstable when opening multiple drawings in the same session when running out of video memory.
• AutoCAD may become unstable when opening large amounts of drawings.

Hatch

• Hatch may not display properly when dynamic blocks are part of the boundary and live preview is enabled.
• Some hatch objects on a newly thawed layer may require a “REGEN” to display.  
• Some custom hatch patterns may not display in the Ribbon Panel.
• AutoCAD may become unstable when using  grips to select hatches in some drawings.
• AutoCAD may become unstable when editing annotative hatch through the Ribbon.
• Hatch Scale may revert to 1 when setting transparency and angle on a hatch pattern on a 64-bit operating system.

Help

• Welcome Screen Videos may not play on 64-bit operating systems.
• Searching Online Help may be slow.

Layer

• Changing layers transparently from the Ribbon will not update to the new layer when you complete the command.
• Layer properties cannot be changed transparently from the Ribbon.
• When a large amount of layers exist in the layer dialog, changing them in the Ribbon layer control will not update the layer dialog.
• After setting a new layer current, focus is set to the "Name" Column.

Licensing

• Cascading license can't be checked out if one of the distributed server machines doesn't exist on the network.
• AutoCAD cannot get a license from the distributed server when one of servers is stopped.

Image

• AutoCAD may become unstable when plotting a drawing with plot transparency set to "On".

Materials

• Protein Materials values created on a 64-bit operating system will not work on a 32-bit operating system.
• When FBXEXPORT is using the default settings, de-selecting the Insert as Block option in FBXIMPORT results in nothing being imported.

MText

• Mtext Paragraph spacing cannot be removed.
• Text in AutoCAD Mechanical-created Fit dimension can change unexpectedly after DDEDIT.

Object DBX

• Unable to export multi-line attribute values with Object DBX.

OLE (Object Linking & Embedding)

• Drawings with OLE objects saved as a DXF file no longer contain OLE options.

Open/Save

• AutoCAD may become unstable when using undo on large drawings.

Other

• FBX^® files imported from Autodesk 3ds Max will not import unless materials are unchecked.
• AutoCAD may become unstable if a drawing REGEN occurs after editing a block.
• AutoCAD will not take advantage of the 3 gigabyte switch when enabled on a 32-bit operating system.
• Color book values may not display properly in AutoCAD
• Some PGP aliases may not function in AutoCAD LT.

Partial Open

• AutoCAD may become unstable when SDI (Single Document Interface) is set to 1, while editing drawings with OPENPARTIAL are set to 1.

PDF Export

• Adobe Reader may display a warning message “Cannot find or create the font “ArialMT” when opening PDF files created in AutoCAD.

Publish

• AutoCAD may become unstable when publishing large drawings to PDF.

Raster Design

• AutoCAD may become unstable when inserting some BMP images.
• Saving with ISAVE, ISAVEAS, and ISAVE again may cause an error message that you cannot save the file.

Ribbon

• AutoCAD may become unstable in a side-by-side install if the files tab path points to the Install Directory of AutoCAD 2010.
• AutoCAD may become unstable when Regional and Language Options are set to Turkish language.
• Ribbon Fold Panels cannot be transferred in the CUI Editor.
• AutoCAD may become unstable if you have a "." in your menugroup name.
• While in a command, changing the workspace from the Quick Access toolbar will not work.
• Loading custom toolbars from the Ribbon may fail.

Section & Flatten

• All cut-away geometry in sectionplane may not display properly when selecting “Show Cut-away Geometry”.

Selection Highlighting

• Selection Cycling displays when none should be visible.
• AutoCAD may become unstable when holding control and hovering over intersections of lines.
• Changing the Selection Cycling toggle from "Off" to "On" and then quitting AutoCAD may cause you to receive an error report.
• AutoCAD may become unstable after using the "CapturePreviewImage" method

Snaps

• Crosshairs do not extend across the screen when set to 100% in isometric snap style.

Visual Lisp

• Visual Lisp may display an error message when using ads_defun and ads_regfunc calls in AcApp.arx.

• When using the lisp function, "vl-directory-files" may cause AutoCAD to become unstable if the directory path is long.