Operating system and graphics card
Windows 7 64 Bit, Nvidia GTX 760
Broken: (example: 2.69.7 4b206af, see splash screen)
Short description of error
When setting the bone roll, then you cannot enable Proportional editing in the Last operator. It always snaps back to Disabled. Does proportional editing even belong here? All the tool does is to rotate the bone.
Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps
Create a bone, enter Edit mode, choose Armature - Bone Roll - Set Roll. Then try to enable Proportional Editing in the last operator.