Bug 67513 [R21PRES] view tab tool tip inconsistent with 2.1
In 2.1, the tab item tool tip appeared in the stack's title bar, not on the tab item itself. The r21presentation currently puts the tip on the tab item. I'll attach a patch that fixes the problem.
bundles/org.eclipse.ui.presentations.r21/src/org/eclipse/ui/internal/presentations/R21BasicStackPresentation.java
protected void childPropertyChanged(IPresentablePart part, int property) {
		CTabItem tab = getTab(part);
		initTab(tab, part);
		switch (property) {
		case IPresentablePart.PROP_BUSY:
			break;
		case IPresentablePart.PROP_HIGHLIGHT_IF_BACK:
			
			
			
			
				     	
			
			 have focus
			
			 break;
		case IPresentablePart.PROP_TOOLBAR:
		case IPresentablePart.PROP_PANE_MENU:
		case IPresentablePart.PROP_TITLE:
			setControlSize();
			break;
		}
	}
	protected final IPresentablePart getPartForTab(CTabItem item) {
		IPresentablePart part = (IPresentablePart) item.getData(TAB_DATA);
		return part;
	}
	/**
	 * Returns the underlying tab folder for this presentation.
	 *