yes it's me again :D
Interestingly in the "General Options" menu page and all the other subpages of the YAK module, the tab functionality diappeared in my installation. The whole content is therefore displayed on the page. Could that be a jQuery issue?
Also, on the "Sales Reports" page, there is a PHP error
Missing argument 2 for wpdb::prepare(), called in /usr/www/users/myusername/myblog/wp-content/plugins/yak-for-wordpress/yak-admin.php on line 858 and defined in /usr/www/users/myusername/myblog/wp-includes/wp-db.php on line 990
What does that mean? Something bad happened with a database somewhere?
When all that stuff happended, I didn't do anything fancy on the website. I mean, apart of changing theme CSS and some lines in the header.php (I added a custom script, which depends on the built-in jQuery). I also tested a html confirmation email. Now YAK doesn't send test order confirmation mails anymore.
Thanks for any suggestions what to do!