The error message is "Error Uploading image. The website certificate may be invalid." The server has a valid SSL-EV by GlobalSign with the appropriate trusted root certificates. The workstation also has a copy of the trusted root certificates. This error occurs with Internet Explorer and with FireFox.
The error occurs when logging in through the fully qualified domain name for the SSL applied to the website.
If you are experiencing this when logging in through a domain other than the fully qualified domain, siteid.bbnc.bbcust.com, please refer to this KB solution (BB738321).