So far JoWooD Community Manager Johann Ertl and PB art director Ralf Marczinczik posted on the subject of the removed JoWooD logos. Neither said that this was an accident.
(all transl.)
Ralf said: "I only noticed the disappeared logos when reading the [WoG] forum.
I suspect infos about this will come from JoWooD in the next days. (... A few general sentences about contracts and confidentiality clauses....)
Sorry - thus no further infos from our side on the logo story."
Ivan Ertlov wrote, in response to a rather ironical post suspecting he probably knows more about it: "(... I´m not involved in this ...) As Ralf and KaiRo already wrote, there are commintments not necessary to "concealment" but at least to remain silent about ongoing agendas, which also can´t avoid to stick to.
But I hope, too, that everything will be cleared up transparently ASAP."
Both definitely doesn´t sound like "Ups, I pressed the wrong key during a page update." Nobody denied that something is going on.