Since delicious upgraded itself, the automatic posting of stuff I have bookmarked has stragely stopped on DavePress. Not at all sure why.
Anyway, to improve things, I have installed the Postalicious plugin for WordPress, which will handle all this for me, on the recommendation of the social media John Virgo, Jon Bounds. There are quite a lot of options and configuration to be done, so I might have to tweak it a bit over the next few days, but hopefully normal service will now be resumed.