Yes, it is usually a problem with the download (static on the line etc) and not the file. Some PC's take their info from the Temp Internet folders when you try to dowload again and just copy the corrupted file. If this happens to you, clear the cache first and make sure you delete the corrupted file from your sytem (and then reboot if that doesn't fix it). Another way around it is to use another download method - a d/load manager Flashget or similar rather than just clicking the link or vice versa.
hillneerg B)