Krita 5.1.1 is strictly a bug fix release. Two serious problems are fixed in this release: a slowdown in start-up time experienced by some people, and a crash when copying a vector layer.
Other fixes are:
Native macOS touchpad gestures should now work properly. BUG:456446
On Android, the application size no longer increases because swap files did not get deleted.
On Android, a possible crash on startup is fixed. BUG:458907
Several issues with the MyPaint brush engine were fixed. The MyPaint eraser now uses the proper brush settings, and the unusable blend mode selector is now disabled if a MyPaint brush has been selected. BUG:453054, BUG:445206
For Animation, the “start numbering at” when exporting an image sequence has been fixed. BUG:458997
Krita no longer crashes if the user has removed the kritadefault.profile canvas input profile from both the installation and the runtime folder
On reading ACO palettes, the color swatch name is now read and set on the swatch. BUG:458209
Fix a crash when selecting a layer in the layerbox. BUG:458546
Improve slider steps for the fade, ratio and similar color selection threshold
When moving paintable nodes, the canvas is updated only once.
Provide the workaround for OpenGL canvas showing black rectangles if there’s more than one assistant visible to all platforms. BUG:401940
Improve the performance of working with ZIP files, like .kra and .ora files.
Fix opening single-layer PSD files. BUG:458556
Make the Update link in the welcome widget clickable. BUG:458034
JPEG-XL: Fix linear HDR export and float 16 import. BUG:458054