I started to write a processing sketch. The first thing I did was opening a new tab with the
name "Magnetic" and then I wrote a class definition. At this time I had 2 tabs laid out, one
was an empty sketch_blabla tab which was created by default, and it was empty. The second
tab was the one with the name Magnetic and I wrote a class definition in it.

Then I wanted to save my project by selecting save from file menu and mistakenly gave the
name "magnetic" (with lowercase m) for the project. IDE should have warned me about a
duplicate name (you can't save with the name Magnetic because a tab with the same name
already exists) but it didn't, instead it created a folder with the name "magnetic" and did put
"Magnetic.pde" in it, then threw an error (java.lang.ArrayIndexOutOfBoundsException: 1),
deleted the sketch_blabla tab so I was left with the "Magnetic" tab with no content in it.

So it seems that the project name/tab duplicate name checker does not check for case
differences, and fails. This is Mac Os X 10.5.2 on intel, processing 1.0.1

Steps to reproduce:

* Launch processing IDE.
* Create a new tab with the name Processing (case is important)
* Write something into the new tab (not really necessary, but demonstrates how I've lost my
code :) )
* Save the project with the name processing (again case is important)

You should be left with an empty tab with the name Processing, and the saved project file
contains no data.

Fixed for 1.0.8. The problem was that it wasn't paying attention to
changing upper and lowercase.