I'm not exactly sure why either. It is very puzzling to me as well. It should not be browser dependent but when I execute the tar command in php, I return the pclose() exit status. On Firefox, there is no problem, it returns 0, but on IE, the same command, same file, it returns 126 if I select more than one file to download and 2 if one file is selected. I even tried it with a 'cp' command and again on IE, it doesn't return 0 but 126.
I haven't resolved the problem yet but I think I will switch over to downloading individual files without taring it since space is an issue. Now I am assume my only way is to use an applet to download these files into individual files, right? If so, does any one have any good samples or links as to how I can accomplish this? I've tried to search other forums and google but haven't had much luck.