> In one of those "asking the question made my mind think of an answer"
> situations: I was using 0.6.12; upgrading to 0.6.13 seems to have helped,
> possibly because it is more rigorous about pinning dependencies to specific
> versions.
>
> I have now moved to 0.7.6, which required only minor edits.
You beat me to it, but that's exactly correct :) We pinned everything to
specific versions in 0.6.13 before releasing 0.7.
Christian