He likely edited the text files in the avatar favorites list.
$pref::Avatar::Accent = 0;
$pref::Avatar::AccentColor = "0.000 0.200 0.640 0.700";
$pref::Avatar::Authentic = 0;
$Pref::Avatar::Chest = "0";
$pref::Avatar::ChestColor = "7";
$pref::Avatar::DecalColor = "0";
$Pref::Avatar::DecalName = "AAA-None";
$pref::Avatar::FaceColor = "0";
$Pref::Avatar::FaceName = "smiley";
$pref::Avatar::Hat = "0";
$pref::Avatar::HatColor = "1 1 0 1";
$pref::Avatar::HeadColor = "1 0.878431 0.611765 1";
$Pref::Avatar::Hip = "0";
$pref::Avatar::HipColor = "0 0 1 1";
$Pref::Avatar::LArm = "0";
$pref::Avatar::LArmColor = "0.9 0 0 1";
$Pref::Avatar::LHand = "0";
$pref::Avatar::LHandColor = "1 0.878431 0.611765 1";
$Pref::Avatar::LLeg = "0";
$pref::Avatar::LLegColor = "0 0 1 1";
$pref::Avatar::Pack = "0";
$pref::Avatar::PackColor = "0 0.435323 0.831776 1";
$Pref::Avatar::RArm = "0";
$pref::Avatar::RArmColor = "0.9 0 0 1";
$Pref::Avatar::RHand = "0";
$pref::Avatar::RHandColor = "1 0.878431 0.611765 1";
$Pref::Avatar::RLeg = "0";
$pref::Avatar::RLegColor = "0 0 1 1";
$Pref::Avatar::SecondPack = "0";
$pref::Avatar::SecondPackColor = "0 1 0 1";
$pref::Avatar::TorsoColor = "0.9 0.9 0.9 1";
Here's the default Blocko avatar config. Anyone have an idea what to do now?
Edit: This goes in General Discussion