ping.fm is not posting the correct links to delicious

Hi, I hope someone can advise me how to get ping.fm to correctly post links to delicious.com. My situation is a bit complicated. My website's rss feed feeds into feedburner. Then feedburner feeds into twitterfeed, which in turn feeds into ping.

Ping is working to update my social networks, but the entries going through to delicious are wrong. They have no title or text and the links go to a blank page (at feedburner).

Of the many articles that have correctly gone via ping to facebook and myspace etc. only three have gone through to delicious correctly. I did think this might be due to using feed flare on feedburner so I have turned this off, but I am still having this problem.

Please see the screenshot for an example of the bad links fed through. I have deleted all the bad links prior to 23/03/09. I would be most grateful if anyone has any ideas on this one.

Please let me know if you need any more information.