Thank you for your quick response.
In fact, the method used to switch language doesn't matter. Problem with simple-lightbox warnings occurs on all English pages and posts containing pictures. All Polish content is free of warnings.
Maybe one fact is important: I have started my blog in Polish only and then I have translated content to additional language (English).
My blog allows to switch language by using widget with flags (English/Polski). You can also add language code to URL:
http://trochimiuk.pl/pl or http://trochimiuk.pl/en.
A warning is displayed at the bottom of the page as many times as the number of pictures on page.
Google shows two more blogs with the same error, try this:
"simple-lightbox/controller.php on line 934"
I am able to reproduce the same behavior on test page.
- Clean install of Wordpress 3.8.1
- Plugin installation: simple-lightbox and polylang
- Uploading media - JPG file
- Translating media</>
- Publishing post in Polish
- Adding english version of post
- Replacing media with english version
Post in first language is displayed without warnings, but the second is with warning.
Polylang documentation:
Piotr