I’m having a similar problem. On the activation screen I get a javascript error: “v1Cropper is undefined.” I haven’t changed the buddypress theme, but I have a custom wordpress theme installed and renamed its folder to “default” to force new blogs to use the customized theme. I saved the original default theme in a backup folder. Is it possible I need some file(s) from the original default wordpress theme? I’m using wordpress 2.7.1 and buddypress 1.0.