I’ve been trying out Rigify lately and I noticed that when I tried to scale the finger controls, the fingers bend the wrong way. All the other controls appear to work fine for some reason. Here is a blend file to show what I’m talking about. Hopefully I don’t want to restart because of all the weight paint adjusting I’ve done so far.
[ATTACH=CONFIG]412950[/ATTACH][ATTACH=CONFIG]412949[/ATTACH]
[ATTACH]412955[/ATTACH]
All MCH-f_etc. bones have wrong roll angel.
Change the roll in edit mode for one bone to the right angle and change all other bones with ctrl.+N copy roll of active bone.
Attachments
BlenderProject1.blend (2.28 MB)
Your metarig’s hand position does not match your model. Change it and generate a new rig.
DanPro: Already tried that and it didn’t work.
VANDERHORST: Going to try that right now. Which ones are the MCH-f bones again?
Thanks for the suggestions. I appreciate them very much.
Edit: Never mind, figured out which ones they were.
The second last in the bottom row of the bone layer.
Thanks Vanderhorst, after a lot of experimenting I got it working right, although I might decide to play with the thumb some more. Go and see for yourself. 
[ATTACH=CONFIG]413040[/ATTACH]