I can't imagine that this is unknown, but it seems, at least for the past few snapshots, the x*tgz files in install48.iso (i386 and amd64) don't match checksums in SHA256 file.
e.g., $ cksum -c ~/snapshots/amd64/SHA256 (SHA256) INSTALL.amd64: OK (SHA256) base48.tgz: OK (SHA256) bsd: OK (SHA256) bsd.mp: OK (SHA256) bsd.rd: OK cksum: cannot open cd48.iso: No such file or directory (SHA256) cd48.iso: FAILED (SHA256) cdboot: OK (SHA256) cdbr: OK (SHA256) comp48.tgz: OK (SHA256) etc48.tgz: OK cksum: cannot open floppy48.fs: No such file or directory (SHA256) floppy48.fs: FAILED (SHA256) game48.tgz: OK (SHA256) man48.tgz: OK (SHA256) misc48.tgz: OK cksum: cannot open pxeboot: No such file or directory (SHA256) pxeboot: FAILED cksum: cannot open install48.iso: No such file or directory (SHA256) install48.iso: FAILED (SHA256) xbase48.tgz: FAILED (SHA256) xetc48.tgz: FAILED (SHA256) xfont48.tgz: FAILED (SHA256) xserv48.tgz: FAILED (SHA256) xshare48.tgz: FAILED
