I'm also having this problem with my game, Pig...I can share it on StencylForge and can produce a test SWF, but export it as a SWF (or, for that matter, publish it.) I get the same error that's listed above, but am on a Mac, and have tried both exporting it onto my external drive and downloading it from StencylForge on a friend's Mac and then exporting it there. I got the same error message, yet have no problem exporting the sample games as SWF, which leaves me to believe it's something in my game itself, but I have no idea what that could be. Could someone else less noob than me try downloading Pig from StencylForge and seeing if they can figure out what's up?