Andrei Ivanov <andrei(dot)ivanov(at)ines(dot)ro> writes:
> I'd rather not downgrade glibc because of some bad experience with it...
> Any way, I've installed the same version of postgresql on another computer
> and copied the data directory the, and, surprise, no errors...
Sounds like the smoking gun to me, for sure.
Exactly which glibc version was this?
regards, tom lane