Created attachment 106709 [details] screenshot Experiencing the following auth check errors many times and for different websites when Krusader is running for longer time. I don't do anything specific in Krusader, Krusader just idling in background. On screenshot it says facebook.com, but I don't browse facebook, from what I understand, I may have a saved webpage somewhere that refers to facebook.com, and kio_thumbnail tries to reach that page, but cert check fails and it prompts about it. That error repeats in a loop not only for facebook.com, but for other domains too. Debian 3.16.39-1+deb8u1 (2017-02-22) KDE 4.14.2 Krusader 2.4.0-beta3
Created attachment 106710 [details] ps output
When I close Krusader, kio_thumbnail stops reporting about the errors.
Krusader 2.4 is outdated for over a year. Please try again with 2.6. Probably an issue within KIO anyway.