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
return title;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.presentations.StackPresentation#setActive(int)
	 */
	public void setActive(int newState) {
		setActive(newState == AS_ACTIVE_FOCUS);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.presentations.StackPresentation#restoreState(org.eclipse.ui.presentations.IPresentationSerializer,
	 *      org.eclipse.ui.IMemento)
	 */
	public void restoreState(IPresentationSerializer serializer,
			IMemento savedState) {
		IMemento[] parts = savedState.getChildren(IWorkbenchConstants.TAG_PART);
		for (int idx = 0; idx < parts.length; idx++) {
			String id = parts[idx].getString(IWorkbenchConstants.TAG_ID);
			if (id != null) {
				IPresentablePart part = serializer.getPart(id);
				if (part != null) {
					addPart(part, getPaneFolder().getItemCount());
				}
			}
		}
	}
	/*