I am using Safari as my primary browser, which no official extension of Delicious. So that I have to use bookmarklet and it's really convenient cause
CMD + 1 would call first bookmark on bookmark bar.
But recnetly when I save a bookmark by this way. The pop over from always notice me that I did't login Delicious, but actually I had login.
Finally, I turned 'Block cookies and others website data' to Never in Safari's Preferences. Now, Delicious bookmarklet works soomthly.
I did't think this is the right way to make it work. In my memory, before Delicious was acquired by AVOS, Delicious bookmarklet will open a tiny window to save it, not a pop over layer. May be that is the right way.