Upon copying world from 2.2.3 I get this Error:
[24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: There are unidentified mappings in this world - we are going to attempt to process anyway [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest13, id 693 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest14, id 694 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest15, id 695 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest12, id 692 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest11, id 691 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest10, id 690 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest6, id 686 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest7, id 687 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest8, id 688 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest9, id 689 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest0, id 680 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest1, id 681 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest2, id 682 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest3, id 683 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest4, id 684 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: chisel:chest5, id 685 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest1, id 681 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest2, id 682 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest0, id 680 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest5, id 685 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest6, id 686 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest3, id 683 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest4, id 684 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest9, id 689 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest7, id 687 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest8, id 688 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest13, id 693 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest12, id 692 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest15, id 695 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest14, id 694 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest10, id 690 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: chisel:chest11, id 691 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: infiniteinvo:locked_slot, id 4981 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified block: TConstruct:TankAir, id 948 [24/3/2015 19:36:55 PM] [Server thread/ERROR] [FML]: Unidentified item: TConstruct:TankAir, id 948