The Release Notes on the SolidWorks 2007 SP0 CDs incorrectly state that the file size in SolidWorks 2007 SP0 has been reduced. This change is targeted for SolidWorks 2007 SP1, and was not implemented in SP0 as stated in the Release Notes. The file size in SolidWorks 2007 SP0 is comparable to SolidWorks 2006 and earlier.
When SolidWorks 2007 SP1 is released it will also be necessary to download a hot fix from Microsoft to see this reduction on saving. This hot fix is described in Microsoft Knowledge Base article ID 922668 on the following area of the Microsoft web site:
Using SolidWorks 2007 SP1 in conjunction with the hot fix from Microsoft will, in many cases, reduce file size. Models with many configurations typically show the largest reduction in size.