Hi,
>the package nvidia-glx-ia32 is not transitioned to /usr/lib32, so
>libc6-i386 should break it.
This will be fixed in 185.18.14-2. A patch for the transition of
nvidia-graphics-drivers has already been committed (#534873).
If you add a Breaks, do it for these two packages:
nvidia-glx-ia32
nvidia-libvdpau-ia32
(the package was split recently) in its current version 185.18.14-1
Andreas