The problem is Delicious not this app Delicious will no longer sync, even for their own Android app. Their app hasn't updated since 2014, so it's their service that changed, not the app. I also tried sending an email to Delicious, but the email came back server unreachable. I would recommend searching on alternatives to Delicious, or alternatives to Diigo (because Diigo's latest Android app sucks), and move on.
Unreliable Takes forever to sync; have lost a couple links already and am going to uninstall it.
Does not work at all Like the android Delicious product, does nothing.
The application still can save links on new del.icio.us. However, it can't download links and tags from there. Please fix.
Just doesn't work at all
FINALLY, a good Delicious app Wow. After years someone finally made a decent Delicious app. ThankYouThankYouThankYou
Fix: Workaround for wrong certificate from delicious.com