from wikipedia:
"Version Four (V4)
This system launched on March 10, 2008. New submissions and edits currently take effect immediately.
...
The changes in v4 have been controversial among active users and former moderators because of what is perceived to be a substantially reduced reliability and usability of the database. As a result, a number of long-time users and former moderators have deleted their accounts,
[7] and several hundred remaining members -- collectively responsible for the initial submission to the database of over 200,000 releases (almost a fifth of the total) -- have indicated they would like the site to return to v3."
http://en.wikipedia.org/wiki/Discogs..._Four_.28V4.29