When default log file size is used database created using 10.0 fails to start using 5.5 on following message:
nnoDB: Error: log file ./ib_logfile0 is of different size 0 50331648 bytes
InnoDB: than specified in the .cnf file 0 5242880 bytes!
140521 12:24:53 [ERROR] Plugin 'InnoDB' init function returned error.
140521 12:24:53 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
140521 12:24:53 [ERROR] Unknown/unsupported storage engine: InnoDB
140521 12:24:53 [ERROR] Aborting
This is because in 10.0 by default log file size is 48M when 5.5 it is 5M.