Got it to work. I think I just missed a step of bumblybee’s instructions. In Slideshow I needed to click on Search Now and check link was actually …/wp-content/uploads/imagerotator.swf. After I saved changes it appears ok.
I am having the same problem. Image list and Imagebrowser are fine. Slideshow doesn’t work any more however and nothing appears in post. bumblybee solution doesn’t work for me unfortunately.