Debt Trouble Could Be Piling Up Overseas By EDMUND L. ANDREWS WASHINGTON FOR the world's poorer countries, this year has been remarkably free from financial meltdowns. Argentina, having had one-fifth of its economy evaporate in 2001, is mending fences with international creditors and slowly putting itself back together. In Brazil, where investors seemed close to a panic last year, exports are surging and the currency remains stable. The Asian and Russian meltdowns of five years ago seem like distant memories. But watch out. In a report that will be published this week, the International Monetary Fund warns that some Asian...