If you are developing with the "org.eclipse.ui.workbench"
plug-in from CVS Head, chances are that you'll need to get an updated version
of two Equinox plugins:
org.eclipse.core.runtime
(CVS: under "/head/" in ":pserver:anonymous@xxxxxxxxxxxxxxx:/cvsroot/eclipse")
org.eclipse.equinox.preferences
(CVS: under "/head/org.eclipse.equinox/compendum/bundles/"
in ":pserver:anonymous@xxxxxxxxxxxxxxx:/cvsroot/rt")
(The next I-build should contain updated
versions of those bundles.)