2009 x64 crashes when draging dims. on sheet

I have been having a reoccurring problem since starting to use 2009 x64 on Vista x64. ( My specs on profile )

In simple drawings of parts that were built in context in an assembly, SolidWorks repeatedly crashes to desktop when dragging dimensions on the drawing sheet.

This happens mostly with radius dims. and to a lesser amount smart dims. Seldom with ordinate dims.

I can insert them all day long but when I start dragging them into a semblance of order the crash occurs.

I have started to control s after each insert and move then restarting the dim tool and re-selecting the style.

That is realy slowing me down.

Any suggestions?

Regards,

SolidworksDrawings And Detailing