System Information
Windows 7x64, GTX 1070

Blender Version
Broken: (2.79a and nightly)
Worked: (2.79)

Short description of error
Inset faces tool do not remember previously entered values (e.g thickness). So new inset will be with default value (thickness 0.01)

Exact steps for others to reproduce the error
1 Create cube
2 Inset face with "i", press F6 and enter desired value
3 Create new inset - previously entered values will be default