Funny that you mention that, considering there's usually a public outrage when it turns out that someone has served 20+ years for a crime that person didn't commit.
You claim that justice wasn't served here (and I tend to agree), but when you say that jurors "aren't afraid to be wrong anymore", in other words, willing to convict someone of capital murder when the evidence just isn't there, that isn't justice either.
When you live in a society where the theory is "innocent until proven guilty", you cannot err on the side of "throw them in jail just in case they actually are guilty".
I think in this particular case there was more then enough circumstantial evidence to convict Casey Anthony on everything except 1st degree murder. Circumstantial evidence in this case just kept building upon itself. If it was just totally random circumstantial evidence I could agree with the verdict. In this case that evidence was anything but random.
1. The child is gone for 31 days before she tells anyone that she is missing. Why?
2. During this time Casey is out partying it up without a care in the world. Why?
3. When questioned about her daughter she intentionally misleads the police time and time again. Why?
4. Searches on the computer at the house for chloroform.
5. Traces of chloroform found in Casey's car.
6. Duct tape on the skull linked to duct tape found at the Anthony house.
7. Body found in a bag that matches other bags found at the Anthony house.
8. Recorded conversations of Casey from jail that were very damaging.
9. Cadaver dog gets a hit on the trunk of Casey Anthony's car.
10. Her defense claims she was sexually abused by her father. Never proven.
11. Her defense claims Caylee drown accidentally. Never proven.
12. Her defense claims her father made it look like a murder and disposed of the body. Never proven.
13. Her defense claimed that her mother looked up chloroform on the PC. Proven false.
The circumstantial evidence (more then I could ever list on here) just keeps building upon itself and pointing directly to Casey Anthony. Her defense teams assertions that her father abused her, that Caylee died accidentally, that her father covered up the death, etc.... were never proven. In fact the defense made no attempt to prove them at all. They might as well have stated that Bozo the clown killed Caylee too.
It wasn't as if this circumstantial evidence was just a flimsy house of cards. It was a freaking mansion with a very solid foundation that was built upon.