10.8.5. Q: When I restore after booting from the media, I sometimes get errors like, "Running out of memory" or "Segmentation fault". What is going on?
From their FAQ:
A: It sounds as if you are running out of disk space, probably ram disk space. Type 'df -m' to see which partitions are running low on space. Please send as much information as you can to the mondorescue mailing list. This problem is believed to have been fixed in 1.63 and 1.71.
MondoRescue HOWTO