OK this is just embarrassing! I´ve loaded today a 3vs3 match, and the black market has dissapeared, like this:
http://cloud.steampowered.com/ugc/524906954782757401/9F77D5BC0B4D8C561B5E6A3B8DC42210345C1089/
http://cloud.steampowered.com/ugc/524906954782758586/3C3FF053F2E88C56926D63F129406562415BFA15/
FYi ivé run the game in windowed mode, but even in fullscreen, the problem is not fixed 
EVEN ive tried to start a new game, and nothing!
T_T