Disconnect between Bloglines and del.icio.us

Why does it take so long for Bloglines to update my del.icio.us feed? Until about a month ago it was working fine, but now it sometimes takes days for my del.icio.us entries to show up in the web-based aggregator. For example, Bloglines updated the feed today and is showing entries all the way back to Jan. 17 — for the first time! Ugh. Anyone else experiencing this (I tend to notice only when my feed has been delayed)?