Well, I had this error, too.
I did some digging around and found only one appearance of “qs_translate”:
it is being triggered somewhere around line 257 in this file:
wp-content/plugin/straker-multilingual-wordpress/straker_hooks.php
So open that file, find the line that contains:
add_action('publish_post', 'qs_translate');
and place two slashes in front of it. This will turn that line of code into a comment. It should now look like this:
// add_action('publish_post', 'qs_translate');
Voi-la! You should get no more errors posting new posts.
Side note: The “qs_translate”-function seems to be part of the (commercial) straker translation services – something most of us don’t use.
If you do depend on straker doing translations for you, please get in contact with straker for a fix.
About the weird dates: play around with your settings of the straker plugin:
backend -> left sidebar -> Settings -> Languages -> Advanced Settings -> Date / Time Conversion…
Good luck!
Sawatzki
