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I am posting this in the general forum since I have no clue where this might be coming from.
Since yesterday all users who are not admin get the following error message when they are trying to access certain pages on the site (Drupal 7.8 - no certain pattern visible):
"Exception: Query tagged for node access but there is no nid. Add foreign keys to node.nid in schema to fix. in _node_query_node_access_alter() (line 3218 of ...\modules\node\node.module)."
I'd really appreciate if someone could point me to the direction where I should start looking to solve the problem.
Thanks a lot in advance!