Hi,
The issue is reproducible for both Delicious and Pinboard. Bookmarks are often swept out of the catalog entirely forcing me to rescan manually for plugin catalog entries. It seems to occur after I'm offline for a certain amount of time, I suppose after 10 min (which is my automatic rescan interval time) or when for some reason Delicious of Pinboard fails to respond.
I guess there is an error in the code in the exception handling so that the catalog entries are cleaned when the plugin fails to retrieve the bookmarks.
The entries should be cleaned only at initial retrieval when setting up new credentials, but not after automatic rescans.
Thank you for maintaining Quicksilver, keep up the good work !
Best regards,