http://en.wikipedia.org/wiki/Binary_blob
This system is currently running Linux 2.6.30-2-powerpc and you are installing Linux 2.6.32-trunk-powerpc. In the new version some of the drivers used on this system may require additional firmware files:
radeon: radeon/R520_cp.bin, radeon/RS600_cp.bin, radeon/RS690_cp.bin, radeon/R420_cp.bin, radeon/R300_cp.bin, radeon/R200_cp.bin, radeon/R100_cp.bin, radeon/RV710_me.bin, radeon/RV710_pfp.bin, radeon/RV730_me.bin, radeon/RV730_pfp.bin, radeon/RV770_me.bin, radeon/RV770_pfp.bin, radeon/RS780_me.bin, radeon/RS780_pfp.bin, radeon/RV670_me.bin, radeon/RV670_pfp.bin, radeon/RV635_me.bin, radeon/RV635_pfp.bin, radeon/RV620_me.bin, radeon/RV620_pfp.bin, radeon/RV630_me.bin, radeon/RV630_pfp.bin, radeon/RV610_me.bin, radeon/RV610_pfp.bin, radeon/R600_me.bin, radeon/R600_pfp.bin, radeon/R520_cp.bin, radeon/RS600_cp.bin, radeon/RS690_cp.bin, radeon/R420_cp.bin, radeon/R300_cp.bin, radeon/R200_cp.bin, radeon/R100_cp.bin, radeon/RV710_me.bin, radeon/RV710_pfp.bin, radeon/RV730_me.bin, radeon/RV730_pfp.bin, radeon/RV770_me.bin, radeon/RV770_pfp.bin, radeon/RS780_me.bin, radeon/RS780_pfp.bin, radeon/RV670_me.bin, radeon/RV670_pfp.bin, radeon/RV635_me.bin, radeon/RV635_pfp.bin, radeon/RV620_me.bin, radeon/RV620_pfp.bin, radeon/RV630_me.bin, radeon/RV630_pfp.bin, radeon/RV610_me.bin, radeon/RV610_pfp.bin, radeon/R600_me.bin, radeon/R600_pfp.bin
Most firmware files are not included in the Debian system because no source code is available for them. You may need to reconfigure the package manager to include the non-free section of the Debian archive before you can install these firmware files.
If the blobs are remove using the linux-libre de-blob script Who knows
http://www.fsfla.org/svnwiki/selibre/linux-libre/