Reference/Release Notes/2.81/a

Blender

 * Fix : Eevee stops rendering after selection attempt
 * Fix : Mask or Mirror before Armature breaks weight paint
 * Fix : Viewport rotate doesn't work
 * Fix : Crash showing the object relations menu
 * Fix : Hair particles: Brush effect not occluded by emitter geometry
 * Fix segfault when polling `MESH_OT_paint_mask_extract`
 * Fix : Broken 'Select' > 'More' in face mode in UV Editor
 * Fix : 'Reset to Default Value' on a custom string property crashes
 * Fix : Crash on snap to edge
 * Fix crash exiting edit-mode with an active basis shape key

Addons

 * Fix : SVG import error on specific files
 * Fix : Rigify crash if the Advanced mode is set to New.
 * Fix : STL crash exporting object without data