Recently Nemetschek released Service Pack 2 for English Vectorworks 2010 and its variations (eg Landmark, etc).
Vectorworks 2010 now has Service Pack 2 which fixes issues with DXF/DWG import & export, wall joining as wells as a few other updates. For all you techies who want to know everything that has been updated you can go here for the full list of SP2 updates. To download the Mac(169Mb) and Windows(64Mb) 2010 Vectorworks Service Pack 2 go here. Remember to follow the instructions and have SP1 installed before updating to SP2.