For instance, take this piece of code:

var person = new Person();

or for you Pythonistas:

person = Person()

I'm told constantly how bad this is, but have yet to see an example of the immorality of these two lines of code. To me, person is a Person and trying to give it another name is a waste of time. I suppose in the days before syntax highlighting, this would have been a big deal. But these days, it's pretty easy to tell a type name apart from a variable name. Heck, it's even easy to see the difference here on SO.

Or is there something I'm missing? If so, it would be helpful if you could provide an example of code that causes problems.