Index: modules/taxonomy/taxonomy.module
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RCS file: /cvs/drupal/drupal/modules/taxonomy/taxonomy.module,v
retrieving revision 1.442
diff -r1.442 taxonomy.module
337c337,339
<   db_delete('term_relation')->condition('tid1', $term->tid, 'OR')->condition('tid2', $term->tid)->execute();
---
>   
>   $or = db_or()->condition('tid1', $term->tid)->condition('tid2', $term->tid);
>   db_delete('term_relation')->condition($or)->execute();