13:54:50,765 ERROR [STDERR] 31-Aug-2007 1:54:50 PM com.sun.facelets.compiler.TagLibraryConfig loadImplicit
INFO: Added Library from: jar:file:/C:/Program%20Files/jboss-4.0.4.GA/server/default/tmp/deploy/tmp20718component-showcase-exp.war/WEB-INF/lib/ic
efaces-facelets.jar!/META-INF/jsf-html.taglib.xml
13:54:50,812 ERROR [STDERR] 31-Aug-2007 1:54:50 PM com.sun.facelets.compiler.TagLibraryConfig loadImplicit
INFO: Added Library from: jar:file:/C:/Program%20Files/jboss-4.0.4.GA/server/default/tmp/deploy/tmp20718component-showcase-exp.war/WEB-INF/lib/ic
efaces-facelets.jar!/META-INF/jsf-core.taglib.xml
13:54:50,828 ERROR [STDERR] 31-Aug-2007 1:54:50 PM com.sun.facelets.compiler.TagLibraryConfig loadImplicit
INFO: Added Library from: jar:file:/C:/Program%20Files/jboss-4.0.4.GA/server/default/tmp/deploy/tmp20718component-showcase-exp.war/WEB-INF/lib/ic
efaces-facelets.jar!/META-INF/jstl-fn.taglib.xml
13:54:50,859 ERROR [STDERR] 31-Aug-2007 1:54:50 PM com.sun.facelets.compiler.TagLibraryConfig loadImplicit
INFO: Added Library from: jar:file:/C:/Program%20Files/jboss-4.0.4.GA/server/default/tmp/deploy/tmp20718component-showcase-exp.war/WEB-INF/lib/ic
efaces-facelets.jar!/META-INF/jsf-ui.taglib.xml
13:54:50,890 ERROR [STDERR] 31-Aug-2007 1:54:50 PM com.sun.facelets.compiler.TagLibraryConfig loadImplicit
INFO: Added Library from: jar:file:/C:/Program%20Files/jboss-4.0.4.GA/server/default/tmp/deploy/tmp20718component-showcase-exp.war/WEB-INF/lib/ic
efaces-facelets.jar!/META-INF/jstl-core.taglib.xml
13:54:50,906 ERROR [STDERR] 31-Aug-2007 1:54:50 PM com.sun.facelets.compiler.TagLibraryConfig loadImplicit
INFO: Added Library from: jar:file:/C:/Program%20Files/jboss-4.0.4.GA/server/default/tmp/deploy/tmp20718component-showcase-exp.war/WEB-INF/lib/ic
efaces-comps.jar!/META-INF/facelet/icefaces.taglib.xml

There's a means of explicitly listing any taglib.xml files in your configuration, but it's unnecessary, because Facelets scans for them and auto-loads them. The problem is that Facelets then logs an message that makes it look like things are broken. All we have to do is lower the log level enough on that message, and it should stop showing up with the default log level reporting.

3rd\facelets-1.1\src\java\com\sun\facelets\compiler\TagLibraryConfig.java :: Line 419
    log.info("Added Library from: " + urls[i]);

Changing it to one of "config", "fine", or "finer" should probably do the trick.