I wanted to remove the key.jpg image from the Joomla 1.5 website I created, it didn't  go together with the theme of the site. I  wanted to leave an option for  possibly change it to something else later on. This image is used in the login and the logout page of your Joomla website. But first thing first,  to remove the key.jpg image from your Joomla website walk through the following steps.
 

When installing RoundCube webmail I found out that the extension "Fileinfo" (also knows as fileinfo.so) wasn't working or installed and I wasn't sure how to get it fixed. After checking my server I found out that its not even installed or configured to work with PHP and Apache. The settings are already set is my Apache vhost as they are supposed to and if you don't know the settings they you can find it here below. The solution I'm posting here worked very well for me and its probably going to work for you as well. For this solution I'm running a Ubuntu LAMP Server.