Apparently I’ve been living under a rock for a while, because I didn’t know that SHA-1 was being phased out in the immediate future. Thank you, GoDaddy, for notifying me with a month and change to spare. As it turns out, Google will no longer be trusting certain SHA-1 signed SSL certificates with the release of Chrome 39, which is set for November. For details, see the following links.
Gradually Sunsetting SHA-1 (Google) SHA1 Deprecation Policy (Microsoft) Phasing out Certificates with 1024-bit RSA Keys (Mozilla) Due to the fact that our clients often purchase their own SSL certificates, we have no internal records to check what algorithm was used to sign the certificates in use.