I have exactly the same problem with my trial instance of the Jupiter-8V.
No matter what patches I try to select, it only updates the patch name in the virtual display, but the sound doesn't change.
Patch change on the graphical bank buttons works fine. Same problem on the standalone app and in Logic Pro 9.
Using MacBook running OSX Lion.
I'll give it a try on my desktop Mac tonight to see whether it behaves the same there or not.