A number of blocks employed in Jump 4 Update 1 downloads prior to Feb 17, 2011 unfortunately include an invalid AutoCAD arc entity. The "impossible" arc object was created by the AutoCAD Audit and/or Revcover commands used in our quality control process for all templates and support drawings.
The bad blocks may cause the AutoCAD Display System to improperly display instances of these bloxks at incorrect scales when used in Point Styles.
The blocks do not cause any other issue in templates or drawings in 2010, 2011, and preliminary testing in betas of 2012.
Two examples of the blocks are:
The bad blocls are employed in Civil 3D Point Styles of the same name.
Move Civil 3D project data to new drawings based on updated templates.
Easy way to find instances of the blocks in a drawing - Construct a temporary Tool Palette from the drawing or template file. Blocks pictures in the Tool Palette will have noticable different scales. All also include a small circle as demostrated in examples above.
1) Employ a alternative blocks in the Point Styles and purge the bad blocks from drawings.
2) Use the AutoCAD Block Editor (BEDIT) to remove the arc entity from the blocks in templates and drawings.
3) Temporarily detach the block from the Point Styles, purge the blocks, reinsert fixed versions, and reattach to the Point Styles.