Thanks for the info.
I did a partial upgrade just after installing the Beta, which removed libgd2-noxpm and installed libgd2-xpm.
After checking Synaptic history, I realized these might also be due to a partial upgrade:
libpostproc51 replaced with libpostproc-extra-51
There are also the package guile-1.8-libs. I don't know if should be in the default installation or not. It seems to be added by a partial upgrade, but does not have any dependency when I mark it for removal.
Any info on these packages?