I had a little time so I thought I would try the platform builder.
At the point where you make archive-toolchain the script now bombs out because glibc and glibc-linuxthreads (2.2.5) are no longer hosted on the ftp.gnu.org website in bz2 format.
These are now available only in gz format from that site. My temporary workaround was to download the gz versions and repackage them as bz2 format into the src directory but perhaps the make system should be updated to reflect this change.
- Andy