I was feeling good about PB3 like they were making progress & we must be getting close to a release...then after rebooting my free space went from 12 gigs to 450 megs then back to 12 gigs.
am scared to test my biggest issue in PB3; 4 crashes-while-'sleeping'... woke in the morning to find my macbook burning hot... black screen. had to shut down with the power button... hoping it will be ok in PB4 (guess i'll have to test it... at some point...)
I haven't had any issues with sleeping, but I'd say the battery lasting less time & the laptop running hot during normal use when it wouldn't have before on 10.11 are prolly my 2 main issues. I don't know how you'd report something so general tho.