/Library/Internet Plug-Ins/Flash Player.plugin Flex Builder cannot locate the required debugger version of Flash Player. You might need to install the debugger version of Flash Player 9 or reinstall Flex Builder.
Do you want to try to debug with the current version? I got this error before, and I had to create a new project and copy all of the files 1 at a time. I do not want to do that again. I just ran Software Update, and I am not sure what updates occured, but I believe Firefox might have. I really want to fix this issue, and know a good way to fix it that does not involve me copying code for 1 hour+. Please someone help me!

