Some basic questions to start.

Some basic questions to start.

Hello!,
I'm a new man in the community of OpenSource.
I'm from Argentina, my english is not soo good, but, i'm trying.

I need help to start to make contributions at jQuery. I need some answers:

1º. What contain your working environment? I use Sublime Text for code edit, Source Try to work with GitHub. And what more can you recommend?
Anybody write a paper for start with this?

2º. Seeing this ticket: http://bugs.jquery.com/ticket/10710, I see that it's solved in the new latest version of jQuery. Then, what can i do?
If you look this test case: http://jsfiddle.net/3nXvm/4/ with jquery 1.6.4, you can see the problem. but, with jQuery 2.0, the problem is solved.
Then... What is the next here?

3º. Seeing the tickets in this list: http://bugs.jquery.com/query?status=new&status=open&status=reopened&group=version&col=id&col=summary&col=status&col=owner&col=milestone&col=version&report=2&order=id, I see differents tickets in differents versions. If we take a ticket, for example: 10190 (http://bugs.jquery.com/ticket/10190), is of version 1.6.3. That's is pending to do? How can I develop this new feature (or at least try)?

I need so much feedback, please.

Saludos desde Argentina!