Bump not showing properly

Hello all,

I found out an issue once i recently installed the 2.78 version from Blender. Please see attached pictures. I have a cube with a wall texture. Properly textured and scaled (i used Ctrl + A) to reset the scale size, and the node setup taken from Andrew Price for realistic texturing. I want to make a wall with bump but i found out that to see a difference in bump amount i have to move the Distance slider from the Bump node to a highter value than the standard one (0.100). This was not happening with the previous version of Blender 2.77 . Is there something changed with the new version, regarding the scaling? Is there a setting i couldnt find? Its a bug ?

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