The search index could not be updated. The site is misconfigured. Contact an administrator. SQLSTATE[42000]: Syntax error or access violation: 1064 unknown table 'tiki_main_67e2559f7089d' in delete request
1) which tiki release?
2) which language? Do you have a language with special character?
In 1.9 cvs, some fixes have been done about utf8 header encoding that was wrong in 1.8
