Filter Lens Blur not working with russian language as default language of interface in Krita 3.1.2 in MS Windows 7 x64. With english language working, with russian - not. Also can confirm this bug on Kubuntu 14.04 with Krita Lime 2+git20150115+r73626-51-dk~ubuntu14.04.1 . You can change the parameters but filter do nothing while you're not changing the language of interface to english from russian. Then filter will works until you will change it back.
Git commit 0939e8743a701938e484614c9b4a13708caf1edf by Boudewijn Rempt. Committed on 27/02/2017 at 19:19. Pushed by rempt into branch 'master'. Those apparently need to be untranslated for the filter to work. M +8 -8 plugins/filters/blur/wdg_lens_blur.ui https://commits.kde.org/krita/0939e8743a701938e484614c9b4a13708caf1edf
Git commit 937f4e5c73466cfa01f42484386b70d26b078dd6 by Boudewijn Rempt. Committed on 27/02/2017 at 19:20. Pushed by rempt into branch 'krita/3.1'. Those apparently need to be untranslated for the filter to work. M +8 -8 plugins/filters/blur/wdg_lens_blur.ui https://commits.kde.org/krita/937f4e5c73466cfa01f42484386b70d26b078dd6