etoys implementation

[NoiseEHC]

>> There's also a warning at http://wiki.squeak.org/squeak that if you
>> want to run eToys, you need to run a different version of Squeak than
>> everybody else.
>>     
>
>   *That* is Etoys.  What is wrong with it?
>   
Just out of curiosity:
Exactly how is it different from vanilla squeak? (If there is such a 
thing at all.)
Is it a different VM, or just a different distribution since it has a 
different binary blob?