size of the zipped files are not the same if use locally or on remote server

Hello,

In a javascript, i use both SaveAs and ajax to post the zip file on www.postserver.com. When using the code locally, i mean by loading the html page and its javascript on the browser(firefox) it works great in both case. The size of the zipped files are nearly 100KB.

When using a server, i download the html page and the javascript, both zip files (one from SaveAs and the on posterver.com) are coherent but wrong. The filenames inside the zip are correct but the size of each file is limited to less than 2.5KB.

Do you have a clue to help ?