We have SoftArtisans FileUp Professional, v5, 0, 7, 519 that we've been using for quite some time.
This software works fine for uploads and downloads but recently we've noticed a strange thing happening when a client uses Microsoft Internet Explorer v6.x. The problem is localized to files that come from Unix with a .gz or .tar.gz extension. The original filename is preserved but with three additional characters included.
For example, a file that was uploaded contains the name: P6GTBIATMCH18WB.tar.gz. When a user clicks on this link or filename to download the file the browser's file save-as dialog box appears with this filename in the filename box. If a user is using Internet Explorer the filename is: P6GTBIATMCH18WB.tar.gz where the  is somehow added to the file name. If using Netscape the original filename is preserved without the extraneous three characters.
I've researched the online help forums and found a reference to something similar where you have to change the attachment attribute to inline as in:
Response.AddHeader("Content-Disposition", "attachment ;filename="
This has no impact since the  always appears no matter what. I've even parsed the filename on the server to strip off these characters but this has no impact either.
My question to you is this a FileUP software issue or is this a Microsoft issue.
I don't know where to begin.