WordPress database error: SQL syntax error

If I select “Expired” or “Started” or “Not Started” filter in “All polls” list, there is a WordPress database error:

[You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘= ‘2013-07-30 17:48:51’ AND ( name like ‘%%’ OR question like ‘%%’ ) OR’ at line 1]
SELECT * FROM luzwp_yop_polls WHERE end_date <= ‘2013-07-30 17:48:51’ AND ( name like ‘%%’ OR question like ‘%%’ ) ORDER BY name

I see there is a SQL query containing

like ‘%%’

which is very probably wrong.

I am using latest (4.2) version on WP 3.5.1

If this is a bug, are you going to patch it?
Thanks

http://wordpress.org/plugins/yop-poll/