Bug 99675 [build path] New source folders should always be inserted on top
RC2 - create a new project - create a new source folder sources - create a new source folder tests observe: the new source folder is appended at the end. Interesting is that source is prepended. Martin, can you please comment on this.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/NewSourceFolderWizardPage.java
setDefaultAttributes();
			return;
		}
		
		Object selectedElement= selection.getFirstElement();
		if (selectedElement == null) {
			selectedElement= EditorUtility.getActiveEditorJavaInput();
		}				
		
		String projPath= null;
		
		if (selectedElement instanceof IResource) {
			IProject proj= ((IResource)selectedElement).getProject();
			if (proj != null) {
				projPath= proj.getFullPath().makeRelative().toString();
			}	
		} else if (selectedElement instanceof IJavaElement) {
			IJavaProject jproject= ((IJavaElement)selectedElement).getJavaProject();
			if (jproject != null) {
				projPath= jproject.getProject().getFullPath().makeRelative().toString();
			}
		}	
		
		if (projPath != null) {
			fProjectField.setText(projPath);
			fRootDialogField.setText(""); 
		} else {
			setDefaultAttributes();
		}
	}