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 (currentPage.getControl() == null) {
			final boolean[] failed = { false };
			SafeRunnable.run(new ISafeRunnable() {
				public void handleException(Throwable e) {
					failed[0] = true;
				}
				public void run() {
					createPageControl(currentPage, pageContainer);
				}
			});
			if (failed[0])
				return false;
			
			
			
			Assert.isNotNull(currentPage.getControl());
		}
		
		
		final Point[] size = new Point[1];
		final Point failed = new Point(-1, -1);
		SafeRunnable.run(new ISafeRunnable() {
			public void handleException(Throwable e) {
				size[0] = failed;
			}
			public void run() {
				size[0] = currentPage.computeSize();
			}
		});
		if (size[0].equals(failed))