It looks as if I've found the problem with the .zip file. I downloaded it and it appeared to come down OK - the browser claimed to have downloaded a 103.8 Mb file. However, on disc, I have 51.9 Mb file. I've now tried using two different browsers - safari and omniweb. I used different download locations too. It looks like a fairly hard error, truncating the download file. Any suggestions of somewhere I could get it whole? I'd be happy to ftp for it if that helped...