I have a mysterious example where there is still a problem with WysiwygPlugin
I have two almost the same pieces of code.
In the first the SCRIPTURL variable is permanently altered into static text. And in the 2nd it is preserved. It must always preserve TWikiVariables
You have to copy the text to a real topic. You will not see the problem in a form like in this bug report.
%WEB% is not expanded in URLs, so when the first example is run through URL expansion, it generates an invalid URL. This doesn't then get passed through the mirror conversion.
Changed so that if any part of a URL can't be expanded, it is treated as plain text.