Possible Duplicate:
Markdown discrepancy between live preview and finished posts
The second link in this answer ends with a closing parenthesis, which seems to be an issue. So I edited it and tried to fix it by placing a backslash before the closing parenthesis. Which fixes the issue in the preview dialog. But when I save my change, the link in the actual answer is still broken.
Edit
Please note that the closing parenthesis is part of the link:
Resulting post
Please note that the closing parenthesis is no longer part of the link: