allowing selected file types

i know i shouldn't rely on mime types for file verification but anyways.. I use application/zip which works fine on firefox and only allows zips.. however, on Internet explorer it doesn't work since IE returns application/x-zip-compressed for zips.. problem with this is it also allow rar files.. so even checking mime types is just as useless as not using it.. one mime type allows two different file types. pffft. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.338 / Virus Database: 267.9.7/60 - Release Date: 7/28/2005