The plugins site is currently in development.
We've been looking to provide a higher-quality, spam-free experience at the plugins site for some time, and a major error on our part forced us to shut down the current site before we could put the new one in place. We are developing a new site, and you can follow along with its development on GitHub. For more information about this transition, including steps you can take as a plugin author to prepare, please read our post about what's going on.
Delta Differencing Form Submission
The quick explanation of the concept is upon form submission unchanged fields are disabled (using Javascript) to prevent them submitting back to the server. The advantages of doing this can include reduced request sizes and the prevention of "clobbering" data in applications where multiple users are editing the same records.
For the full explanation see the original Difference forum submission in Javascript post.
