I always trust and love products from Nonumber. But after I tested with Sourcerer, I realised that this is a very bad plugin, it even should not be developed.
Maybe the only priority of Sourcerer is that it allows to insert Source Code into also other areas, not only the article content.
When inserting Source Code to Joomla article, I prefer another plugin:
Joomler! SyntaxHighlighter, which uses famous
SyntaxHighlighter as its core.
There is one thing that not good in Joomler's plugin, it requires special syntax to insert the code.
Then I found another solution: there is a plugin for FCKeditor than can insert Source Code without switching to HTML mode, just click the button and a dialog will pop-up, then you paste your code in and choose the code language, then you click the Insert button and those code will be properly inserted to your article.
I use this editor plugin with Joomler's plugin together, then I got easy and beautiful way to show source codes in Joomla articles.
When I saw Sourcerer for the first time, I thought it might also use Syntax Highlighter or something similar to show codes. After the test, I know it is very bad that Sourcerer uses HTML span element to keep the symbols, indentions and colors for codes. When you check the source code of the output page, it is really a mess!
I hope Peter will re-consider the method he used in Sourcerer plugin to display codes. I suggest to use Syntax Highlighter.
Thanks.