I am getting this warning in Eclipse:
NLS missing message: CANNOT_FIND_FACELET_TAGLIB in: org.eclipse.jst.jsf.core.validation.internal.facelet
I realize that this is an old post but I hope this may help somebody. I recently installed the ICEfaces plugin (IF-3.3.0-IM-1.3.0-Eclipse-4.3-plugins-B.zip) for Eclipse 4.3 (Kepler).
I created a New ICEface Facelets Composition Page using the page creation wizard.
After creating the page, I got the same warning message.
I checked the the index.xhtml that was generated out of the box when I created my ICEfaces application and there's a discrepancy.
Changing my new page ns from www.icesoft.org to www.icefaces.org made the warning disappear.