Attempting login on the 190.it website doesn't work.
After logging in, clicking on a link causes immediate log out, the site is unusable for those functionalities that require registering.
This happens in both Safari 3 and WebKit nightly builds.
What version of Mac OS X are you seeing this with?
There were multiple previous reports of this problem, which were duped to bug 3512, and that is supposedly fixed on Mac OS X 10.5.
I'm using OS 10.5, I verified now this behaviour, and works.
*** This bug has been marked as a duplicate of 3512 ***