When enabling resource optimazation in web.xml using
a call to the file gradientA.png is made using the following URL resulting in a 404 error:
The cause is simple to find, an invalid reference using syntax
All other references to gradientA.png in other .ecss files are using the syntax:
And there is also a commented code in notify.ecss https://github.com/richfaces/richfaces/blob/d9ed9ce8336de4b0aa416574f824d212f21ebef4/components/rich/src/main/resources/META-INF/resources/org.richfaces/notify.ecss#L100 using an even older reference.