FYI build 4780 does NOT fix this problem for me.
To complicate matters for my troubleshooting, I switched to 10.6.2 after Christmas. (I thought that I could use 64 bit VE Pro server in Snow Leopard but only 64 bit plugs appear in the menu!?@#?)
But I get the same dropouts...maybe more and eventually a crash.
I wish this could get solved. VE Pro seemed like such an elegant solution. Nothing elegant about it yet. Well, I take that back. When Kontakt is not in the mix, VE Pro seems to work OK.
Of course, the reason I bought it was so that I could load a bunch of Kontakts and keep them loaded as I switched projects.