Look ma, maybe I've been unemployed for 35 months straight but I've learned how to game the Digg system like nobody's bidness!
According to ValleyWag:
Yesterday, Digg went down for an hour in the middle of the day. Initially we thought it was an unplanned outage, but it turns out that a number of changes were made to the algorithm that controls which stories are "promoted" to the front page. The changes have started a mini-revolt among the top submitters reminiscent of the community uprising over Digg's deletion of HD-DVD unlock codes last year. We talked to several top diggers to find out what changed, why they're upset, and we have our own theory for why the changes were made.
It seems a fairly transparent strategy to clean house of the submitters who have been dominating the front page for a while now. Essentially [they] adjusted the diversity factor to skew against popular submitters. Digg-critical stories are frequently buried before they ever reach the front page.
Rumour has it that Digg will donate to pay for trauma counseling for these people.
More on the Horrors of Digging before the new algorithm.