Issue:DPL SQL Error with MediaWIki 1.14

Description:	SQL error
Extension / Version:	DPL   /   1.7.4
Type / Status:	Bug   /   open

Problem

After upgrading to MW 1.14 DPL gives this error when the parser function is used.

{{#dpl:namespace=|shownamespace=no}}

Produces this error.

The DPL extension (version 1.7.4) produced a SQL statement which lead to a Database error.
The reason may be an internal error of DPL or an error which you made,
especially when using DPL options like titleregexp.
Query text is:
SELECT DISTINCT `page`.page_namespace as page_namespace,`page`.page_title as page_title, REPLACE(REPLACE(CONCAT( IF(`page`.page_namespace=0, , CONCAT(CASE `page`.page_namespace WHEN 1 THEN 'Talk' WHEN 2 THEN 'User' WHEN 3 THEN 'User_talk' WHEN 4 THEN 'Mathsreach' WHEN 5 THEN 'Mathsreach_talk' WHEN 6 THEN 'File' WHEN 7 THEN 'File_talk' WHEN 8 THEN 'MediaWiki' WHEN 9 THEN 'MediaWiki_talk' WHEN 10 THEN 'Template' WHEN 11 THEN 'Template_talk' WHEN 12 THEN 'Help' WHEN 13 THEN 'Help_talk' WHEN 14 THEN 'Category' WHEN 15 THEN 'Category_talk' WHEN 503 THEN 'Navigation' WHEN 504 THEN 'Navigation_talk' END, ':')), `page`.page_title), '_', ' '),'♣','⣣') as sortkey FROM `page` WHERE 1=1 AND `page`.page_namespace IN ('0') AND `page`.page_is_redirect=0 ORDER BY sortkey ASC LIMIT 0, 500

Error message is:
Illegal mix of collations (utf8_general_ci,COERCIBLE) and (latin1_bin,IMPLICIT) for operation 'concat' (cs-db.cs.auckland.ac.nz) 

There seems to be a string encoding issue here. I can't be sure that DPL is the cause, but perhaps this error has been seen before. It may be a bleeding edge MW 1.14 issue.

In the code the character following the '♣' is another multibyte/encoded character that cannot render to the web page. Perhaps this gives a clue to the cause.