Error message in ROCK Wiki

Hi all,
when submitting changes to the www.rocklinux.org, I get error messages like:

Database error
 A database query syntax error has occurred. This may indicate a bug in the 
software. The last attempted database query was: 
(SQL query hidden)
 from within function "SearchMySQL4::update". MySQL returned error "1016: 
Can't open file: 'rock_searchindex.MYI' (errno: 145) (localhost)".

Changes are still saved, though.
Can someone with write access please take a look?

With best regards,
Stefan Fiedler