将PHP-CURL上传到Windows WCF之前和之后的文件大小差异

I am trying to upload a file using PHP. Not that tuff right? Well, i need to do it through Webservices WCF. Now i'm stuck with that last part. When i upload the file it is: 892599 (this is what Windows and Linux tells me on the filesystem. And also what PHP tells me. But, when it arrives on the scene (Windows Server, WCF) it's only 891400.I am trying to upload a file using PHP. Not tha