Hi, just for the records i report what Gerd Mühlenbruch and i found out off list:
The reason for the bad dowload was that two wget processes were writing to the same file. Gerd had started the first wget by letting nautilus executing it. For this it created a terminal window with a running wget, which Gerd soon after closed by means of the desktop. Then he wanted to continue downloading by starting wget in terminal window. Closing the nautilus-made terminal would normally shut down the program that is running in it. Not so with wget, where the man page says: Wget is non-interactive, meaning that it can work in the background, while the user is not logged on. This allows you to start a retrieval and disconnect from the system, letting Wget finish the work. We did not explore what exactly causes the oversize of the download result. The situation of two simultanously working wgets on the same file is ill enough to serve as explanation. Have a nice day :) Thomas