I really don’t know what else to try. Maybe one more thing. I noticed, when rendering these problematic pages, the browser’s progress indicator is running few seconds after, these pages are rendered. this also didn’t happen before prettyfaces integration.
we use jsf 1.2, icefaces 1.8.2, latest prettyfaces 3.0.2 snapshot (23.8.) and glassfish 2.1.1. configuration in web.xml is done exactly like the prettyfaces documentation says. we have some more filters defined in web.xml.