When you install Joomla 1.5 or later, the default title for the home page is «Welcome to the Frontpage».
Many Joomla newbies have trouble changing this text. In fact, one of the most commonly asked questions for new Joomla users is 'Where is the "Welcome to the Frontpage" text?'.
Relax, I'll show you how to change it and make your site title into something relevant for your site.