Anyone?? file uploads received, but mangled

Hi all. Last try -- I know there's a lot of noise in this group, but could someone please offer an opinion? Is the following possible to work around, or is it a bug that I should be reporting? I'm having issues uploading files whose names don't necessarily end with the correct extension, in particular plain text files which don't end in .txt. (Why they don't is complicated, and it's impractical to insist that they must.) The files are received, but altered -- they are prepended with garbage data which makes them difficult to deal with in an elegant automated way, which is the whole point. No doubt this is a mime type issue, as the files are received as type "application/x-macbinary" when sent from OSX IE (its best guess, I suppose). Is there any way to force plain text, or raw data? All I want to happen is for the files to be uploaded completely unchanged. Btw, this happens with PHP 4.2.3 on OSX (entropy.ch), and with the latest 4.3 on OpenBSD. Thanks, Alex af@ax-im.com