I can't seem to upload files successfully in a new Wordpress installation. Latest version, 2.8.6, on a Windows server. See screenshot.. the media upload page seems to work ok, no error messages appear at all. But the file isn't being physically placed in the wp-content/uploads folder. If I uploading it manually via FTP, everything's fine. So somehow it's "uploading" ok, but not saving the file. Anyone have any ideas why this would be happening?