LONDON, Jan 8 - The euro eased further from this week's all-time high against the dollar as markets worried the European Central Bank might begin to caution against the single currency's recent strength after its rate meeting on Thursday. The ECB, which announces its rate decision at 1245 GMT, is widely seen keeping borrowing costs on hold at a historic low of two percent, but markets are weighing the possibility that it might express concern over the pace of the euro's recent rise. By 0755 GMT, the euro was down a third of a percent on the day at $1.2591 compared with Tuesday's all-time high around $1.2812. The euro was also down nearly half a percent against the yen at 133.68 . The dollar was a touch lower against the yen at 106.14 , and close to three-year lows below 106. Investors strongly suspect the Bank of Japan has been in the market this week selling yen to slow its appreciation against the sliding greenback. The Bank of England is also meeting on rates, but widely expected to keep them on hold at 3.75 percent when it announces its decision at 1200 GMT. Thursday's data schedule includes German December unemployment at 0900 GMT. A source told ahead of the official release that the 2003 jobless average was 4.376 million, the highest since 1997. U.S. initial jobless claims for the week ended January 3 are due at 1330 GMT and expected to total 350,000 compared with 339,000 in the prior week.//