I have a host that was attached to BAM! manager.
The points stats on boincstats.com stopped updating all of a sudden.
I went to "Host List", selects my host with bam id 261454, and clicked on the stats link which is http://boincstats.com/stats/boinc_host_graph.php?pr=bo&id=3adedbc4259ead70e8f2b0eebfda0c23
The stats page shows that it stops updating since Feb 1st.
I've just checked my BOINC program, and it is still running everyday. I've also did a "synchronize with BAM".