These look a lot like what my Shit (Mr. Nice) plants are doing. This strain used to kill it, now it grows huge with strange leaves, small buds that don't fill out. They are growing along with some Apollo 11, SLH, NL, and Jack so I know it's not a light problem (since the other plants are doing fine).
I have no idea why this is happening now, but it sucks. Anyone have any ideas? Does this look like what is happening with your plants?