AutoCAD Civil 3D 2011 Update 1 has been released. You can find the 32-bit and 64-bit downloads here. Over 40 Civil 3D issues have been addressed with this update and it includes the latest updates for AutoCAD and AutoCAD Map also.
Update 1 for AutoCAD 2011 and AutoCAD LT 2011 has been released today. Are you wondering what problems were addressed? Check out the README file that comes with every update.
In fact, don't just download the .EXE and start clicking away - take a couple of minutes and read the README file. It will tell you exactly which file to download, what files you might want to backup before application of the update, and how to extract the MSP file, among other things....
There is a link to the README file on each of the download pages, listed below.
Notes: This update is for AutoCAD and AutoCAD LT only. It does not apply to and will not install on vertical products like Civil 3D, Map, etc. There are separate 32-bit and 64-bit versions. Read more about AutoCAD 2010 Update 1