LONDON (Reuters) - The dollar tumbled to a record low against the euro on Tuesday after a warning by euro zone officials on the euro's rise fell on deaf ears, with investors determined to dump the U.S. currency.In a joint statement late on Monday, the European Central Bank and euro zone finance ministers gave their starkest warning to date that they were unhappy with the euro's strength. In an echo of developments that preceded the ECB's maiden intervention in the currency markets of 2000, the statement said policymakers were monitoring the situation closely. But the dollar, under pressure from...