missing {} around table names

Accessing /webdav/nodes/ and /webdav/vocabularies/
I've got some 'table does not exists" error on SELECT statements
in files webdav\webdav_taxonomy\webdav_taxonomy.module
and webdav\webdav_node\webdav_node.module

E.g.
$cursor = db_query("SELECT name,type from node_type order by name") in function webdav_node_nodes_members()

$cursor=db_query("select r.title,r.nid from term_node t
inner join node_revisions r on r.vid=t.vid
inner join node n on r.vid=n.vid .... in function webdav_taxonomy_vocabulary_members(

.. and others

Adding {} around table names solves the problem.