[Plugin: Polylang] Feature request: Changing back to using different featured images

Oups, it seems I had some db-issues resulting in inconsistent behaviour. Cleaned up the mess now and have updated to 0.6.1 again.
To get separate featured images for multilingual posts my temporary solution is to remove ‘_thumbnail_id’ on lines 323 and 363 in admin-filters.php.

In fact, what you request is already possible without modifying the plugin code, thanks to the ‘pll_copy_metas’ filter. This filter was first intended for plugins or themes developers to add their own post meta to the synchronisation process. But it can be used to remove the default one.

I did not test but this code should work:

<?php add_filter('pll_copy_post_metas', 'unsync_thumbnail');
function unsync_thumbnail($metas) {
	return array_diff($metas, array('_thumbnail_id'));
} ?>

You can add it for example to your theme functions.php. Thus you will be able to update polylang without loosing your personal option.