I just upgraded versions (uninstalled first) and now received an error message when I click on the "Tag Meta" link or the "Rules" link ("Synonyms" and "About" links ok). The update was to version 1.7.3 enterprise from version 1.7.2 enterprise.
Error message read:

An error has occurred.
500 Unknown column 'a.custom_header' in 'field list' SQL=SELECT a.id, a.url, a.case_sensitive, a.request_only, a.decode_url, a.last_rule, a.placeholders, a.title, a.description, a.author, a.keywords, a.rights, a.xreference, a.canonical, a.custom_header, a.rindex, a.rfollow, a.rsnippet, a.rarchive, a.rodp, a.rydir, a.rimageindex, a.comment, a.synonyms, a.synonmax, a.synonweight, a.preserve_title, a.hits, a.last_visit, a.ordering, a.published, a.checked_out, a.checked_out_time,uc.name AS editor FROM joom_tagmeta_rules AS a LEFT JOIN joom_users AS uc ON uc.id = a.checked_out WHERE (a.published IN (0, 1)) ORDER BY a.ordering asc

Thanks in advance for any help.
Joe

Thanks for the quick reply. A custom version to reinstall sounds easy if it is not too much trouble for you.

Luigi,
It worked perfect. Thank you...best support ever.