I just installed this on 3.4.1
I added an event with a title of 'Testing an Event' but noticed the permalink had set itself to something like 'test', maybe it was 'testing', anyway - so I manually changed it to 'testing-an-event' and then when publishing the event and trying to view it I got a page not found error.
So I edited the permalink back to 'testing' and then I could access the event on the front end.
But, instead of display any content for the event it displays this shortcode [wpuf_addpost]
I will have to move on and try to find another plugin but wanted to let the developer know.
Thanks! I'm sure this is a very useful plugin when it's working properly.