Hi Christian,
I've had a quick look over this report (and we also spoke on IRC a little while back), but sadly it's beyond my level of experience.
Realistically a ticket is usually picked up by either someone who has an interest in the subject, or by a core developer based on priority.
So there are three viable options here;
a) Keep trying to fix the problem, mess around with the config, perhaps see if you can reproduce it in a clean room environment, i.e. in virtual machines
b) Try and bait the core developers to take a look (you can try the 5-for-1 approach mentioned in [1], or post a bounty [2])
c) See if anyone picks this up
Sorry I couldn't be of any further assistance on this one :/
Cal