hi, a have a problem.
look this.
I insert in JCE in Joomla 1.5 this

{source}[[span class="color: red"]]This text should be red![[/span]]{/source}

One of your example.

The result is this:

[]This text should be red![]

Sourcerer! is a the one module in this position. The javascript plugin is installed and ok.

thank you.

Where have you entered that? In the Sourcerer! module? Or in a content item?
What does the final html source look like?
Do you have an online example?