What is the deal with MD5 checksums?
If you upload all of your files by 24 January 2007, 5 pm Eastern time, you can ignore the MD5 checksum. The system will, however, compute and report the MD5 checksum for any file you upload, once the uploaded file has been completely received by the submissions server. You may find this useful if you want to check that your file has been uploaded without corruption. Just compare the MD5 checksum you compute for your file with the checksum computed by the submission system. If you are uploading in the last couple of days of submissions, server response may be slow. To be sure of making the deadline, you may initially upload just the MD5 checksum for your files. If the MD5 checksum is received by 24 January 2007, 5 pm Eastern time, you will have 24 hours to complete the upload of files that have a matching MD5 checksum, i.e. you will have until 25 January 2007, 5 pm Eastern time, to upload files for which MD5 checksums have been entered. Information for Physical Submission of Supplementa
