For the first time I have a problem with Hudson. To be exact, it is 1.221. The symptoms are below:

1. there are some access denied messages in project configuration page. Funny though because it includes Hudson front page.
2. state of last build is not persisted, so it keeps rebuilding.

Downgrading to 1.219 solves both problems. I have to cease using Hudson web start .

Update 1: Hudson 1.219 does not resolve the latter problem completely. State of last builds does not survive hudson restart.