@hellveen, your original post is not exactly correct. WordPress is an open source project and anyone can contribute. If you read the WordPress blog, you would notice that:
We always talk about things like downloads, and the 2.3 branch has already had 1.92 million downloads as I write this post, but this time we have some far more interesting information I’d like to share.
There were over 1,200 commits to our repository since 2.3.0 and over 90 people were credited in them. This means in our core code, not plugins, there were at least 90 individual folks that contributed something high-quality enough that it made the cut to be part of the download you guys get today. I had no idea this group of people was so large.
Anyways, did you follow the step-by-step in http://wordpress.org/support/topic/165449 ? If yes, did you see the big js file in step 4? If yes, as ian_spare mentions, could you look for specific js errors that would allow someone to trace your specific problem. Thanks.