Reliability & Performance History truncated - Help?

[No response in the Perf. group, so I'll try here]

Vista HP BSOD'd this morning...

When I went to check the reliability history ("System Stability Chart") to
see what happened, I found the history ended on 26 Aug 07!

I have checked that the RAC agent is enabled (as per "Enable Data Collection
for Reliability Monitor" in the Management Console Help) and it has been
running all this month... where's the history then?

[System AV is AVG Free... full scan every night, no issues]

Any ideas?

Resolved: see posting in Performance and Maintenance...