What is the Joomlatwork patch anyways? The Joomlatwork SEF patch consists of a number of files that replace the original Joomla! files. These files will provide you with a lot more features to optimize your web site for better search engine visibility and performance. The Joomlatwork SEF patch will overwrite some of your core Joomla! files. This means some of the files from your default Joomla! installation will be replaced by files that are altered to make the improvements you want.
I normally would not encourage you to use a patch, as patching core files creates problems if you want to update to the next Joomla! version. For this patch, I am making an exception because it brings a lot of improvements to Joomla! from a Search Engine Optimization point of view.
It is fine to use this patch. After a Joomla! update the guys at Joomlatwork will have the patch updated to the latest version in two or three weeks or sometimes even sooner. This means...