Layout tests can't be run using Debug version of QtWebkit build, but can be run using Release build. Does it mean the run-webkit-tests script under WebKitTools/Scripts may not have support for Debug version of the Webkit ? Here is my environmetal variables: LIBRARY_PATH=/usr/local/Trolltech/Qt-4.4.3/lib QTDIR=/usr/local/Trolltech/Qt-4.4.3 LD_LIBRARY_PATH=/usr/local/Trolltech/Qt-4.4.3/lib WEBKITDIR=/home/mobuntu/src/cwrt/Webkit WEBKIT_TESTFONTS=/home/mobuntu/src/cwrt/Webkit/TestFonts I am using the latest Webkit trunk code as of 1:00 PM EST 14-Nov-08.
You can run the layout tests with Debug build just fine. Just add the --debug flag when you run.