I think that sashz was ready to put beta2 for the 6000, when I tried beta2 on my 860 and discovered the bug with the new sd driver, and that he chooses to fix this bug before continuing to put online beta2 with problems for the 6000 (that's probably also why 1.1.0beta2 is not pinned in the forums).
1.1.0beta3 should be ready very soon from what I heard on irc (ie days) with the fix, I guess sashz will also provides beta3 for 6000.