[golergka]

The problem is, not all of these languages think that "" and null are equal.

[codebje]

I might choose to rephrase that as "the problem is, some of these languages think that "" and null are equal." :-)

[goatlover]

Isn't the lack of strict equality a result of loose typing in those languages?

[codebje]

Maybe - often more to do with overeager coercion, which does tend to go hand in hand with loose typing.