Listens: E.S. Posthumus - Tikal

I'm having a problem with my brushes

There actually IS a topic about this in the memories but it doesn't help me--none of the suggestions seem to apply.

Anyway, all of my brushes are suddenly showing up as very light. One in particular I've used for months, since I first started making icons. It's always been very solid--now whenever I use it I have to duplicate it about five times before it's completely opaque. I have the brush mode set on normal with one hundred percent opacity. I always apply my brushes on their own layer.

Any idea what could suddenly be causing this and what setting I can change to fix it? I know some setting had to have been altered but I can't for the life of me figure out which.

All suggestions are appreciated. :)

ETA: I use PS7