Bug 93245 [Dialogs] Error messages show up in two locations in the properties dialog
Force an error message: 1) select a Java project 2) open the properties dialog 3) navigate to Java Compiler>Building 4) enable project specific settings 5) enter a letter into the maximum number of problems field ->the error message shows up at the bottom 6) resize the dialog ->the error message also shows up in the banner
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
if(hasFailedOK)
						return;
					
					if (!errorOccurred)
						 
					    
						handleSave();
					
					close();
				}
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.core.runtime.ISafeRunnable#handleException(java.lang.Throwable)
			 */
			public void handleException(Throwable e) {
				errorOccurred = true;
				
				Policy.getLog().log(new Status(IStatus.ERROR, Policy.JFACE, 0, e.toString(), e));
				clearSelectedNode();
				String message = JFaceResources.getString("SafeRunnable.errorMessage"); 
				MessageDialog.openError(getShell(), JFaceResources.getString("Error"), message); 
			}
		});
	}
	/**
	 * Selects the page determined by <code>lastSuccessfulNode</code> in the
	 * page hierarchy.
	 */