As I updated os X to the latest, new bug appeared with 2.5.8.
When I have fade value for layer, and when I click on layer on / off button to fade it out, it first goes totally off for 1 frame or something and then comes back fades out, making nasty flashes, so now I have to fade out manually from layer transparency.
My computer is latest mac book pro
Model Name: MacBook Pro
Model Identifier: MacBookPro5,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.53 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 6 MB
Memory: 4 GB
Bus Speed: 1.07 GHz
Boot ROM Version: MBP51.0073.B02
SMC Version: 1.33f6