What this means is that if you have data written by Storable 1.x running
on perl 5.6.0 or 5.6.1 configured with 64 bit integers on Unix or Linux
then by default this Storable will refuse to read it, giving the error
Byte order is not compatible. If you have such data then you you
should set $Storable::interwork_56_64bit to a true value to make this
Storable read and write files with the old header. You should also
migrate your data, or any older perl you are communicating with, to this
current version of Storable.
See if setting that flag helps.