I use to work with SW and now Acrobat 3D and it's right the capture is slower with SW 2006 and 2007 while it's super fast with 2003. I don't know if this is because of Acrobat or SW - we didn't have the chance to compare 2003 and 2007 capture on A3D v8 - but my feeling is that SW 2007 is from far slower than 2003.

The PDF export from SW sounds strange to me; I couldn't have a confirmation.
Let us know if you have something new. I'll look forward to read news about it!

Thank you 3DCAD for your help !