Hi,
I faced the same problem after 3 hours I figure out it like this.
I am running wordpress with xampp version 1.7.2. Open xampp control panel. Click on the Admin button for Mysql or goto https://localhost/phpmyadmin/. There you will have the database you created for wordpress on left menu. In my case the name of database is ‘wordpress’. Click onto the wordpress database. You will see the db structure on the right. There you will find the column saying ‘Collation’. Check the collation for your widget. In my case it was wp_testimonial and it was displaying latin1_swedish_ci. Try changing it to utf8. Or open it by clicking on to the second icon in Action column (that is structure). You will see the structure for your plugin. There you edit one by one all rows (with the second pencil icon in Actions panel) and change it to utf8_unicode_ci…
Hope this might help…
