PNG saving with Messed up colors

[mythic]

I'm sorry for the extremely lame title.

 

The problem I'm having is that I'm using phpbb3 and a mod on it to create avatars. The mod is no longer supported, dude dropped off the face of the earth. But right now, we're having a trouble with our images saving all messed up. Because there are too many colors. They look like this:

That hair is meant to be black...

 

Anyway, I'm wondering how I can fix this in the coding, or if its because of the GD library. The code where it saves the image is here:

 

// START Save
case save: 
	// Check if user has an Avatar yet! If not, create one!
	$sql 		= "SELECT * 
					FROM $table_avatar_characters 
						WHERE user = $user_id";
	$result 	= $db->sql_query($sql);
	$tot_users 	= $db->sql_affectedrows($result);
	if ($tot_users < 1)
		{
			$sql2 			= "SELECT * 
								FROM $table_avatar_layers 
									ORDER BY position DESC";
			$result2 		= $db->sql_query($sql2);
			$tot_layers 	= $db->sql_affectedrows($result2);
			$insert_values 	= '';
			$insert_layers 	= '';
			for( $i = 0; $i < $tot_layers; $i++ )
			{
				$row2 			= $db->sql_fetchrow($result2); 
				$row2_name 		= $row2['name'];
				$insert_layers .= ",$row2_name"; 
				$insert_values .= ",'' ";
			}
			// Create character!
			$sql3 	= "INSERT INTO $table_avatar_characters (user$insert_layers) 
						VALUES ('$user_id'$insert_values)";
			$db->sql_query ( $sql3 );
		}
		// Now that they got a character, insert the selected images into the db!
		$sql 				= "SELECT * 
								FROM $table_avatar_layers 
									ORDER BY position DESC";
		$result 			= $db->sql_query ( $sql );
		$tot_layers 		= $db->sql_affectedrows($result);
		$insert_values 		= '';
		$insert_layers 		= '';
		$dont_show 			= '';
		$no_show_list 		= '';
		$dont_show_layers 	= '';
		for( $i = 0; $i < $tot_layers; $i++ )
		{
			$row = $db->sql_fetchrow($result); 
			$insert_layers .= ",$row2_name"; 
			if($insert_values != "")
				{ 
					$insert_values .= ', '; 
				}
			$row_name = $row['name'];
			$post_row_name = $_POST[$row_name];
			$insert_values .= "$row_name = '$post_row_name'";

		} 

			$camorea_display = 'avatar_save';
			// Update character!
			$sql = "UPDATE $table_avatar_characters
			 		SET $insert_values 
						WHERE user = '$user_id' ";
			$db->sql_query ( $sql );
			// START At last, create the PNG image!
			$tot_width = $avatar_width;
			$tot_height = $avatar_height;
			// Get all layers in the correct order!
			$sql = "SELECT * 
					FROM $table_avatar_layers 
						ORDER BY position ASC";
			$result 	= $db->sql_query ( $sql );
			$tot_layers = $db->sql_affectedrows($result);
			$crtavatar = false;
			for( $i = 0; $i < $tot_layers; $i++ )
				{	
					$row = $db->sql_fetchrow($result); 
					if ($_POST[$row['name']] != 'spacer.gif')
					{
						if($crtavatar == false)
						{
						$avatar_front = @$avatar_build($phpbb_root_path.$sprites_path.'/'.$_POST[$row['name']]);
						$crtavatar = true;
						}
						else
						{
							$image = @$avatar_build($phpbb_root_path.$sprites_path.'/'.$_POST[$row['name']]);
							@imagecopy ($avatar_front, $image, 0, 0, 0, 0, $tot_width, $tot_height);
							@ImageDestroy($image);
						}
					}
				}
			$save = $user_id;
			imagealphablending($avatar_front, false);
			imagesavealpha($avatar_front, true);				
			imagepng($avatar_front, $phpbb_root_path . $chars_path . '/' . $save . '.png');
			imagedestroy($avatar_front);
			// END At last, create the PNG image!

			$exported_save = $chars_path."/".$save.".png";

	break;
// END Save

 

I have a feeling that it's saving as 8-bit, but I want to up that so that the images don't appear messed up.

Does anyone know  how?