Yep, they are "out there", but they are not - as a rule - "in here". If you specifically want a response from Adobe, you need to raise a support ticket with them. Whilst occasionally an Adobe person will post here, I get the impression it is only when the question is one of the ones on their "script". The patrons here are just community members, on the whole.
I've no idea what's causing your issue, but a few things:
* which precise log is this in?
* what locale is your site running under?
* do you have any code which will have non-ASCII characters in it?
* are they are any other log entries (if any other logs) made at the same time which might point you at some code that's causing this?
--
Adam