looking for help with Delicious problems

I'm using the Firefox add-on (version 2.1.106) to bookmark things, but for some reason I can't make my latest bookmarks actually show when I go to my delicious account. When I press the tag button on a page that I bookmarked yesterday, the add-on shows me my tags and note (I assume from some locally stored version), and that I'm logged in, but the delicious site itself doesn't, neither in the recent view, nor when I search for one of the tags. I just bookmarked another page to see whether maybe Delicous might deign to sync with me during a new bookmark action, but now my two most recent bookmarks don't show, rather than just one. The ones before that show okay, but I have no idea what I could have done to make it stop working. I looked in the add-on menu and can see any option causing this.

I did try clicking the "Sync Now" button, but that doesn't do anything, and the "Full Sync" fails. I tried logging out and in again, and after looking at the delicious support forums I tried deleting the ybookmarks.sqlite file in the profile folder, but even with that deleted it doesn't sync.

Is there anything else I could try? Because the on site interface delicous provides seriously sucks, after their latest update more than ever, so I can't really use that.

ETA: I can add bookmarks when I switch to "classic mode" but the bookmarking pop-up in that is horrible, and as soon as I go back to normal mode the syncing continues to fail. :(

this all sucks

Apparently Yahoo is planning to shutdown delicious and have already gotten rid of all the delicious employees, so maybe that it is not working right for me is already due to degrading infrastructure?

And the other bookmark service I used fannishly, Simpy, (well once upon a time I bookmarked fanart there because they had better tag operators than delicious, but it had been flaky so I drifted away) shut down earlier this year, as I only now noticed. They didn't even sent users an email or anything, so I didn't export my bookmarks from there. Thankfully that were only a couple not the 5800+ I store on delicious. :(

Also SGU was cancelled. And even though I would have rather had SGA, I still watched SGU. I'm not that broken up about it being cancelled, but I'm not gleeful that it's gone either.