I have a problem with ampersands in URL's that use ampersands.
The use of ampersand is kind of important in a URL. You probably know this already but the ampersand in a URL often to set GET parameters for a request to a server side script.
Here is an example of some code I'm referring to. You can see the "&url=" that causes the problem.
How can you use ampersands in attribute values of XML compliant code?