Over the last month, I’ve received several complaints about bookmarks not being saved to Delicious. Before that time, I received no similar complaints. This leads me to believe there has been a change on the Delicious side that I am unaware of.
I’ve contacted Delicious about the problem and I’m investigating. If there is a bug in DeliciousSafari, I will release a new version to fix the problem. There is more information about this problem in the documentation pages.
Also, many people have asked if DeliciousSafari works with Safari 4 beta. As far as I know, it does. If it doesn’t work for you, please let me know.