Some Endpoints now showing up as offline

Hi

I'm still getting some endpoints, about 20% of them, displaying as being offline, including my own computer.

I looked at the log and it registers my computer completing a scan

2013:01:29-11:41:19 keywest epsecd[6352]: I id="4225" severity="info" sys="System" sub="epsecd" name="Handled SAV event" event_type="SAV" effect="Scan 'Full Scan' completed." mcs_id="***XX-***X-***X-***X-******" cause="scanCompleteEvent"

I did a fresh, uninstall / install, after the last update when they said they fixed this problem.

Any ideas?