The following issues have been resolved in AutoCAD Civil 3D 2013 Service Pack 2:

.NET API

• Setting the Description property in a PointGroup object no longer causes an error.
• An unexpected error no longer occurs when calling ExportAsPolyline3d on a CorridorFeatureLine containing a break point.

Alignments

• Closing the Superelevation Curve Manager no longer causes the application to close unexpectedly.
• An issue that affected the visibility of feature lines in certain regions has been resolved.

Corridor Design

• Handling of large station values has been improved.
• Closing a drawing while the Corridor Section Editor is open no longer causes the application to close unexpectedly.
• Importing a duplicate subassembly no longer causes errors after prompting to overwrite the existing subassembly.
• Adding a subassembly to a LinktoMark point in an offset assembly no longer causes an error.

Cross Section Views

• Volume tables now remain as saved when reopening the drawing.
• Changing Section View Group Bands now adds labels automatically when you modify or add values in the Section View Group Properties dialog box.
• Changing the material style of a section in the Object Properties Manager no longer causes the application to close unexpectedly.

Feature Lines

• An unexpected error no longer occurs when grip-editing a feature line after undoing the FILLETFEATURE command.
  

General/Other

• When closing AutoCAD Civil 3D 2012 on a system with AutoCAD Civil 3D 2013 installed side-by-side, a blank warning dialog is no longer generated.
• Stability when installed on a Windows 8 operating system has been improved.

Hydraflow Storm Sewers

• The pipe shape settings for box and elliptical pipes are now respected upon import.

Hydraflow Express

• The accuracy of the Modified Rational SDF value has been improved.

Hydraflow Hydrographs

• The accuracy of the Modified Rational SDF value has been improved.

Labels

• Latitude and Longitude are now displayed as expected in General Note Labels.
• Profile station labels using station index format with rounding are now displayed correctly.
• Alignment labels using the crows foot block are now aligned as expected.

Lines/Curves

• The Create Curves Between Two Lines and the Create Curves On Two Lines commands now work as expected.

Object Enabler

• An error when displaying surface contours in a RealDwg environment has been resolved.

Parcels

• Copy and pasting a parcel table with a LineBetweenTwoPoints label no longer causes the application to close unexpectedly.

Pipe Networks

• An error when displaying Pipe Network Vistas has been resolved.
• An error when deleting a pipe or structure with Prospector hidden has been resolved.
• The accuracy of the Part Builder Data Structure Table has been improved.
• The structure style block rotation is now aligned with the 3D solid.

Plans Production

• Masked match lines now retain the expected appearance when editing the position of a view frame.
• When creating a new sheet using plan production tools the north arrow is now oriented as expected.

Plotting

• An issue that caused a "command in progress" error when plotting a window has been resolved.

Point Clouds

• LIDAR Point Classification style settings are now displayed as expected.
• An issue that caused inaccurate loading of an ESRI ASC file has been resolved.

Pressure Networks

• An issue that prevented a part from the pressure pipe catalog to be inserted into the drawing successfully has been resolved.
• Valves in profile view are now scaled as expected in metric drawings.
• An issue that caused an error when running the FollowSurfaceINPV command has been resolved.

Profiles

• Importing profile view band label styles now overwrites an existing band style as expected.
• An issue that caused pipes or profiles to display incorrectly when switching layouts or plotting has been resolved.
• An issue that caused the grid in a profile view to be displayed incorrectly has been resolved.

Project Management

• Used and where used information is retained when re-checking in a drawing into Vault.
• DwgRelPath retains leading periods on Windows XP based workstations.
  

Projection

• 3D solids projected in section view are now displayed as expected.

Prospector

• Parcel information is now displayed as expected after sorting in list view.

Quantity Takeoff

• After changing a material, the name and style are now listed correctly in on the Sections tab of the Sample Line Group Properties dialog box.
• Creating a materials list from a sample line group no longer causes the application to close unexpectedly.

Subassembly Composer

• Importing a subassembly with a long path name no longer causes the application to close unexpectedly.

Shortcuts

• An issue that caused pipes and pipe labels to not plot as expected has been resolved.
• Creating a reference to a grid surface no longer causes the application to close unexpectedly.
• An issue that caused profile labels to not display as expected has been resolved.

Surface

• New surfaces created from a DEM now use the user specified coordinate system.
• Waterdrop polylines now display proper linetype generation.

Survey

• The accuracy of the traverse analysis report has been improved.
• The latitudes and departures for the face 2 observations are now calculated as expected.
• An issue that caused incorrect display of Northing and Easting values without updating the network has been resolved.
• The performance of importing a fieldbook has been improved.
• The performance of updating a network has been improved.
• The performance of the Least Squares Analysis command has been improved.
• Accuracy when using a reciprocal observation field book file has been improved.
• Inserting a traverse into the drawing no longer results in rotated linework.