Comment Plugin - error in displaying user name

That's a quick fix, it's just a wrong variable name. Try this instead:

list($_wsc_commentsRecords, $_wsc_commentsMetaData) = getRecords(array(
    'tableName'   => '_wsc_comments',
    'loadUploads' => true,
    'allowSearch' => false,
    'where'       => 'recordNum = ' . $detailRecord['num'],
  ));

Sorry, I should have mentioned: this code needs to go AFTER the function that gets the $detailRecord. I just looked at the file you sent me before and the comments function is entered before it. Make sure to put the comments function after the others and that should fix the error.