Hi, I tried the support forum first, but no one seems to answer there, so forgive me if this is thread is misplaced. I am trying a simple thing: I declare (straight from pro drupal development): function phptemplate_preprocess_breadcrumb(&$variables) { drupal_set_message(print_r("some message,true)); } After clearing the cache, i also check the theme-registry (via the developer module) and it is listed under breadcrumb->phptemplate_preprocess_breadcrumb as: 2 (String, 33 characters ) phptemplate_preprocess_breadcrumb | (Callback) phptemplate_preprocess_breadcrumb(); However, it is NEVER called as far as i can tell. Variables set in there are always empty and message set as shown above never show either. I am sorry to bother the list with this, but WHAT am i doing wrong? thanks matt