"downgrade" 7.1.x to 7.0.x

Hi all,
I'm running a 7.0.3 on a (FreeBSD) production box and am thinking about
upgrading a development box to the latest 7.1 beta4 (it builds out of
the box axcept for some Tcl/Tk headaches)

I would like to use the 7.1 beta's on my development box but do not want
to run the betas on the production machine. In the near future I am
going to be hitting the row limit so I will need to run 7.1.x for
development for this anyway.
My question is this: as long as I do not pass the row limit will I be
able to use 7.1 dumps on an 7.0 box or would the "downgrade" cause problems?

Thanks,
Rob