Solution confirmed. Problem solved. Thanks a lot!

After saving article in backend (Save or Save and Close button), the blank page appears. The article is correctly saved but it is very annoying.

Enabling logging, I see the following error:

Fatal error: Call to a member function getTag() on a non-object in /hosting/www/lesany.info/www/libraries/cms/application/site.php on line 328

Once the plugin Content - ARTIO JoomSEF is disabled, the problem disappears.

Joomla 3.4.4, JoomSEF 4.6.3

After installation of version 4.6.0, pagination works again. Thank you, Artio team, for quick fix.

The same problem here. I have temporarily fixed it by the hacking of pagination.php but this is unsustainable.

Please note that the problem persists even if the frontend template is changed, so it is not about the incorrect overriding of pagination.php by the template implementation.

Problem is discussed also here: forum.joomla.org/viewtopic.php?t=875002&p=3273016

I can confirm the observations made there. I.e. if JoomSEF is disabled and default Joomla SEF is enabled, the pagination works correctly. So I can provisionally conclude that it is rather the problem of JoomSEF and not Joomla.