Do the amount of structures between uploads depend on your CPU speed? One of my clients a P3-600 is doing 3000 structures per upload but my P4 1.5GHz machine is still doing 5000 structures. I extracted the new DF client (CASP5) from the same ZIP file.
I noticed the distributedfolding.com/org site went back "temporarily down" again so are there any problems and you are updating the client again or is this just the page you get when the web server is overloaded?
Jeff.