I think I found a fix... I posted this in the thread about making sirius work on your BB:
Ok, after playing around with this for a bit I think I found a fix for anyone having an issue with the orb page only showing "HOME" and "OPEN APPLICATION".
Try the following method:
In your browser, press the BlackBerry menu button. Selection "Options". Then choose "Browser Configuration". On this page, look at "Browser Identification". At one point I had changed this to "Firefox". After changing it back to "BlackBerry" my Orb page now displays correctly.