I am still having issues getting the slideshow (1.2.2) to show up in 3.4. I'm using the StartBox framework, which I have used successfully with older versions of the plugin.
In Firebug, I'm getting a couple of errors. Here is a link to a screen capture with the error console on.
And here are the errors themselves:
Component returned failure code: 0x80004003 (NS_ERROR_INVALID_POINTER) [nsIDOMHTMLDivElement.appendChild]
I hope this helps!