Created attachment 362976 [details]
Description of problem:
preinstalled system(f12 beta TC on ppc) with such partitions :
PPC PReP Boot 4M
this system can normally boot and log in.
reinstall system with default settings,on partition step, select use free space and click next, an error will occur.
see attached picture. I can not get anaconda log due to bug:526158
This should be fixed in the next build of anaconda.