A few days ago, my copy of Zone Alarm suddenly began failing to catch about half of all the spam I receive. Usually, Zone Alarm catches 99+% of all the spam I receive. This is happening on both of my computers. I haven't changed any of my Zone Alarm email (or other) settings. Has anyone else seen this problem? Any ideas on how to get Zone Alarm's spam filter working properly again?

Here's my ZA info:
ZoneAlarm Extreme Security version:8.0.298.035
TrueVector version:8.0.298.035
Driver version:8.0.298.035
Anti-virus engine version:6.0.2.678
Anti-virus signature DAT file version:996298455
Anti-spyware engine version:5.0.209.0
Anti-spyware signature DAT file version:01.200910.6805
AntiSpam version:6.0.0.1429
ZoneAlarm ForceField 1.3.153.0

My computer is a Dell Dimension 8400 running XP-SP3. (As I said this is also happening on my other computer, a Dell Inspiron 700m running XP-SP2.)

Thanks,
Joel