Bug 215985 [Markers] Description column not sorting text
Currently the description column in the problems view is sorting by severity but not comparing Strings of equal severity.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerEntry.java
static Map collationKeys = new HashMap(0);
	private String folder;
	IMarker marker;
	/**
	 * Create a new instance of the receiver.
	 * 
	 * @param marker
	 */
	public MarkerEntry(IMarker marker) {
		this.marker = marker;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.MarkerItem#getAttributeValue(java.lang.String,
	 *      boolean)
	 */
	public boolean getAttributeValue(String attribute, boolean defaultValue) {
		boolean value;
		if (attributeCache.containsKey(attribute)) {
			Object cached = attributeCache.get(attribute);
			if (cached == null)
				return defaultValue;
			value = ((Boolean) cached).booleanValue();
		} else {
			value = marker.getAttribute(attribute, defaultValue);
			attributeCache.put(attribute, new Boolean(value));
		}
		return value;
	}