Windows 2000 and NT problem uploading file to server

When i upload a file from a windows 2000 or NT machine (Excluding XP) it seems like the filename passed by my variables or the HTTP_POST_FILES points to a file on the user's computer and not on the temp folder of my apache server. Ex: I upload a PDF file from a page on my server and on win98, 95, me and XP it passes right, int he HTTP_POST_FILES or in my $upload_fr variable, i have the correct temporary file name on the server, but under win2000 or winnt users i get the complete path on their computer like: d:\\my documents\\pdf\\pdfen01.pdf ??? Any clue on how to resolve this issue, because this is quite problematic in a sense that half of the users on the web site are using win2000 or winnt. ps: It seems that it doesn't do that on all computer, i think it's because some of them have IE 6, but i'm not sure (And in any case, i'd like to bypass this problem, on whichever platform or browser) Thankx Math @lias InsaneCoder