Here is a link to the OHIM note on the subject in the July Alicante News, where it is described as a future development although it had apparently already been operational in June.
The OHIM website will now contain three versions of a design - that in the database, that in the Bulletin, and that in the certificate - which will not necessarily be in accordance with each other. The Bulletin version will be exactly as-published, warts and all; the certificate (if corrected) should show the design as it should have been published, and the database should be updated to include any subsequent changes (e.g. assignments).
According to OHIM, "The new e-certificates have the same legal value ... as the existing paper certificates ...". It is far from clear what value that is, since anyone can download and print a copy, and edit it beforehand if so desired. As certificates go, this one is remarkably uncertified.