0% chance?

Isn't this picture a little strange?

http://i.imgur.com/1XG9dO4.png

Tried with Chrome, IE and FF, always same result. Is this normal to waste one of hard obtained books?

::skull::

It is just a cosmetic bug,your geo still has a 15% chance to find quality shafts, if you put 1 more book it will show 30%.

A while back the graphics/text bug went for Explorers: [FIXED] Graphics glitch: Lucky detour -> increased to 0% but like the Geo now, their actual behavior was also unchanged.

Thank you!
This was reported and it should be fixed with one of the next game versions.

Not fixed, now it shows 8% chance to find quality shafts ( and not 15%)