LDConfig Confusion

[Tore Eriksson]

I just downloaded the latest LDConfig.ldr from http://www.ldraw.org/library/official/LDConfig.ldr
Its header reads:
0 !LDRAW_ORG Configuration UPDATE 2011-06-03

But I already have a copy of LDConfig.ldr, and its header reads:
0 !LDRAW_ORG Configuration UPDATE 2010-06-19

This is supposed to be newer, but in the currently official but older(?), there are four more colours compared to the one I already have on my hard drive.

83 Metallic_Black VALUE #1A2831 EDGE #000000 METAL
87 Metallic_Dark_Gray VALUE #6D6E5C EDGE #5D5B53 METAL
321 Dark_Azure VALUE #078BC9 EDGE #088DCD
323 Light_Aqua VALUE #ADC3C0 EDGE #AFC9C2

What is this file dated 2011-06-19? I don't know where it comes from.
And are those four colours official standard? (I guess so since they are there in the ufficial version.)

/Tore