By Dhara Ranasinghe LONDON (Reuters) -A note of caution took hold of world markets on Tuesday, with the dollar and equities slipping and gold briefly hitting new record highs on concern a U.S. government shutdown could delay key jobs data. The dollar was broadly weaker, European stocks dipped and U.S. equity futures pointed to a weak open on Wall Street as Washington braced for a fast-approaching government shutdown as Republicans and Democrats appeared unlikely to reach an agreement that would extend fu ...