Table: John Malone to Mike Armstrong: Take That!

Relations between Malone's Liberty Media and AT&T remain tense. Here's why:

-- Starz Encore, Liberty's premium cable movie unit, filed suit against AT&T on July 10, claiming AT&T owes $44 million to cover programming costs. AT&T disputes the claim.

-- AT&T (T ) and Liberty (LMG.A ) are at an impasse over how much Malone must pay for access to AT&T channels for interactive programming.

-- Liberty will invest up to $1 billion to help News Corp. (NWS ) buy DirecTV (GMH ), which competes with AT&T Broadband.

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