Bug 73769 [Dialogs] Open Resource dialog has OK enabled when entry invalid
3.0.1 RC2 - Ctrl+Shift+R - type: WorkbenchWino (note the missing d) and hit Enter - the dialog is dismissed with no action Should disable OK if there is no match.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/ResourceListSelectionDialog.java
* create the dialog, resources will be gathered dynamically as the pattern
     * string is specified.  Only resources of the given types that match the 
     * pattern string will be listed.  To further filter the matching resources,
     * @see #select(IResource).
     * 
     * @param parentShell shell to parent the dialog on
     * @param container container to get resources from
     * @param typeMask mask containing IResource types to be considered
     */
    public ResourceListSelectionDialog(Shell parentShell, IContainer container,
            int typeMask) {
        super(parentShell);
        this.container = container;
        this.typeMask = typeMask;
        setShellStyle(getShellStyle() | SWT.RESIZE);
    }
    /**
     * Adjust the pattern string for matching.
     */
    protected String adjustPattern() {
        String text = pattern.getText().trim();
        if (text.endsWith("<")) { 
            
            return text.substring(0, text.length() - 1);
        }
        if (!text.equals("") && !text.endsWith("*")) { 
        	return text + "*"; 
        }
        return text;
    }