Used Advanced Search based on the following queries:

Search for keywords: *** Your Latest Screwball Newsletter ***

Search within: topic titles only

All other fields left as default.

Returned in header:

[phpBB Debug] PHP Notice: in file /includes/utf/utf_tools.php on line 187: mb_strpos() [function.mb-strpos]: Empty delimiter.
[phpBB Debug] PHP Notice: in file /includes/utf/utf_tools.php on line 187: mb_strpos() [function.mb-strpos]: Empty delimiter.
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3795: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3206)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3797: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3206)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3798: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3206)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3799: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3206)

... then search results displayed as normal.

I've recently upgraded and moved forums from phpBB2 to phpBB3 and the topic searched for above existed in my phpBB2 forum. I'm now aware though that * is used as a wildcard so will remove * from topic title. Should I had still not received this error though?