I'm going to commit an update to texinfo later today, hopefully. This changes the way info files get split.
We had a mechanism in pkg_create to deal with it for a while, but I had postponed the corresponding code in register-plist for a while. If you do use PLIST_DB (as most bulk-builders should), then you definitely want to update register-plist before building new packages. The new register-plist does smart comparisons (has for a while, in fact), and does not complain about benign changes in the infrastructure. And now, it won't complain if the number of info-* files is not the same. Which is what you want after the texinfo update... such central software as gmake being affected...