Im not sure if this is a rapidweaver6.08 - 6.3 problem or browser problem.
When i export a file (any theme) to view in a Yosemite browser i can open the main page but if i click on a link, it goes to a file directory view of the linked page.
This is because, when exported to a local folder, you’re using the “Tidy Links” option - and because your local folder is not configured to behave like a web server, it doesn’t know to route you to index.html in the folder when given the /page0/ URL. If you set up something such as MAMP to configure a local HTTP server, this will ensure things preview for you
Yosemite comes with a built in webserver, not easy to configure and didn’t work that well for me. Just installed MAMP - works a treat, thanks @nikf for the tip off.