Ezra Klein's Vox.com launched Sunday. He told Leslie Kaufman of The New York Times he left the Washington Post because “We were badly held back not just by the technology, but by the culture of journalism.”

Some people pounced Monday morning after a Vox "card" about Ukraine changed without apparent acknowledgement:

Reached by email, Klein said Vox cards "will be added as changes are made" to others. Here's the one for the Ukraine piece, which says, "April 6: Cards 1 and 17 were updated to reflect pro-Russian protests in eastern Ukraine and the increased risk of Russian invasion."

On Twitter, Vox senior editor Timothy B. Lee said the card solution will be in place "until we have tech to do it gracefully." The new site "isn't perfect, and it isn't anywhere near complete — not editorially, and not technologically," Klein, Melissa Bell and Matt Yglesias write in an introductory post.