This document here describes varios compatibility issues between different
version of SIB. 

1.2 with pre 1.2
 full compatibility

1.1 with 1.0h
 full compatibility (although multipacket frames can not be receivced by 1.0h)
 
1.0h with 1.0f-g
 compression compatibility broken
 
1.0g with 1.0f
 fully compatible

1.0f with < 1.0f
 Uncompatible due to the CONTROL byte added.
 However, versions prior to 1.0f were never released.