Block does not appear on localized nodes

I'm having the same issue, the only difference being it's happening with the generic Basic Page content, rather than a custom content type.

When having no restrictions on block visibility, it shows on every page. But when I try and set it to be only visible on pages tagged with the term 'Products', it does not show on any page, even those which have the term 'Products'.

Let me know if you need any more information.

Thanks for your bug reports. I have been thinking hard, but I don't know yet what might be causing this. Can one (or both) of you provide the steps to reproduce your error on a clean Drupal 7 installation? Thanks.

I have just noticed that the block is only visible if the language is set to neutral, it disappears when the language is set to English, could this be related to the problem above?

Bob3009: yes, that could be the cause. As said, I'd love to know exactly how I can reproduce the error.

This error happened whilst using Drupal 7.8 and Block Visibility by term 7.x-1.0-alpha1. When I create an article and tag it with a term and use langauge neutral the block appears. If I change the article to English and re-save, the block disappears.

It's the same block apareceen not any page when using taxonomy terms of this failing is not that I'm using pathauto in taxonomies, please help someone who has solved this problem

Field language ≠ node language.

A language neutral taxonomy (default) and a localized node (in my case, dutch, NL) is what you need to reproduce this problem.

The error occors because you try to get the tid using the node language as an array key. While the tid is actually "und".
A workaround is to use field_get_item().

I've rewritten the relevant part in block_term_block_list_alter:

   $node = menu_get_object();
  if (!empty($node)) {
    $node_tids = array();
    // Get taxonomy_term_reference field names.
    $taxonomy_fields = db_query("SELECT field_name FROM {field_config} WHERE type = 'taxonomy_term_reference'");
    foreach ($taxonomy_fields as $field) {
      $terms = field_get_items('node', $node, $field->field_name);
      if (is_array($terms)) {
        foreach ($terms as $term) {
          $node_tids[$term['tid']] = TRUE;
        }
      } 
    }
  }

After this change module will work just fine.

Changing title for clarity.

Thanks a lot, it works for me

Change added to development branch... thanks rv0!