(In reply to smoki from comment #23)
>  Tried now what you said pure 64bit kernel packaged as amd64.deb and voila
> no corruption with it! Both are distro kernels from experimental and my
> kernels behave the same there, 32bit as i386.deb one give corruptions, 64bit
> and packaged as amd64.deb works fine. But hmmm, how and why those differ
> both are 64bit in different package or?

Is there any difference in the /boot/config-3.* file between the two packages?