Alexander and Frantisek, It should be of no surprise that if you don't step up and report an issue, it won't get fixed. Sending a description of the problem to misc@ is not the correct way of submitting a report. Doing so is more or less like whispering on a large avenue that your car is broken and expecting the car repairman 3 or 4 blocks away to hear it.
bugs@ is the right place to go, preferably with a (filled) formal PR like the ones sendbug(1) generates for you. Having two separate lists is the only way we have to differentiate between the usual amount of discussions that this list is meant for, and punctual bug reports that could be worked on. That said, let's get on what actually matters: Alexander, can you please try to build a test-case that rules out NFS, if at all possible? It certainly looks like the culprit. Also, are you still running 3.7, or have you tried a more recent version of OpenBSD? If you have, were you still able to reproduce the same problems? Finally, please don't say you have cool diffs to make things work, and that if people want to do X or Y under OpenBSD, they should go talk to you. Submit them for review. This is not Linux. Frantisek, I unfortunately have no idea as to what kind of issues you were running into. Could you please send me the details of the problem you had, or point me anywhere I could find them? Anyway, please reply to me privately, or even better, submit PRs through sendbug(1), and I will get back to you. -p.