On Sunday, June 16, 2013 11:43:02 PM UTC-4, Tim Taylor wrote:
I have had two flights in a row come back with Purple Validation
rather than green.
So far no explanation from the OLC guys why this is happening.

OLC acknowledged they have a bug in FLARM OLC validation on
June 10:

Hello Dave,
looks like a bug, I will investigate, and I scored the flight
with a green V manually,
best regards
Hannes

Apparently they still have not got it fixed...
Aarrggg...