I frequently receive emails in the German language. The letters 'u' and 'a' are frequently modified by the use of an Umlaut (two dots), but these are not reproduced correctly. Instead, a series of letters and symbols appear, which are evidently a result of faulty decoding - probably at my end. Note that this has not always been the case. I may have changed something, but have no idea what it was. Help in this puzzling matter would be much appreciated!.