timo906

Yes, you can nest a Levels adjustment or Curves adjustment in the mask, set the adjustment's target channel to Alpha and lift the adjustment's output.
Lift a Levels output by dragging the Output Black Level (the fourth slider) to the right.
Lift a Curves output by dragging the bottom left node upwards.

Hey y'all!
Ever since the update to 1.8 the way the opacity slider acts on mask layers changed. I can try to explain it using words, but I made some screenshots to show you what changed.



 
As you can see in the last two panes; the way the opacity slider behaved in the new and old version changed completely. Now, I now that applying different shades of gray on the mask can achieve the same thing (which I used to make this example) but I loved how the slider worked in the previous version. Especially when using various degrees of grey on the mask. With the slider you controlled the entire mask. 

Anyone know how to fix it or a workaround? Or should I hope it'll be patched in the next update?
 
Thanks!

It's a known bug that's being investigated but someone in support said adding an empty pixel layer to the group will cure the problem for now
(I think that's what they said?  Don't have time to find that post again)