When 2+ words are used in the header search box the result is a blank page with "WARNING: An Error occurred, please refresh the page and try again."

The search works fine when the 2+ words are enclosed in quotation marks.

Switched to Classic template and got the same results.

It does work when there is only one word. No quotation marks required.

Have not modified the header_php.php files. Upgraded from v1.39 to v1.5.

Site is: http://www.gilderfluke.com/ (Note: currently having an SSL issue - please ignore - working on getting it straightened out.)