Maintenance and troubleshooting are an integral part of any application. At any stage of the application — installation, configuration, and use — a problem may occur. As the applications covered in this book are open source and distributed free of cost, it is often difficult to get enough documentation for solving such problems. This chapter focused on some of the key issues related to Joomla!, Flash, and the individual extensions, which may arise during the exercises depicted in this book. Besides pointing to the probable solution for such problems, we have referred to relevant websites and forums from where you can get more help to solve problems.