Just a note for you guys creating your own partitions on sd-cards ...
Although PiCore is relatively nice to sd-cards running mostly from ram, one can still optimize by using 4mb *boundaries*, and not the usual 1mb.
Cards these days are big, so the 3-mb "wasted" may not be as much of a concern as it would be 10 years ago.
Note that this is far different then when doing a "dd" with a blocksize of 4mb, ie
dd if=./picore10.x.iso of=/dev/sda bs=4M <<-- not the spec I'm talking about.
This is NOT a reference to burning with a blocksize. Just so you don't get confused.
It's a partition-boundary thing instead!