Thanks to everyone who has been alerting me to the fact that the same post has been showing up here over & over again. The problem is once again that Delicious has gone crazy and the auto-post task over there is stuck in a state where it constantly respawns. I have reported the problem but their tech support is sadly very thinly staffed (I do wonder if the guy who knows how to fix it even works there any more). If some other service offered blog postings I would switch in a heartbeat.
I have switched off Twitter/Facebook/Identi.ca notifications, but the only way to stop delicious posting is to change my WordPress password and I’m reluctant to do that too early as it breaks lots of other things, and anyway it stops the Yahoo people seeing there is really a problem they need to debug – clearly they didn’t last time it happened.
I just hope Stumbleupon or whoever are buying Delicious know what they are taking on.