That happеned during last WSPR activity period (12 August) on 40m band. Once I've noticed the following sequence:
2009-08-12 22:14 UT2UZ 7.040190 -20 0 KO50cr 2 VK8CH PH57 11836 90
2009-08-12 22:14 UT2UZ 7.040147 -8 0 KO50cr 2 VK8CH PH57 11836 90
2009-08-12 22:14 UT2UZ 7.040104 -20 0 KO50cr 2 VK8CH PH57 11836 90
The first idea, came into brains, was that something wrong is with my equipment.
However, more triple sequences were seen that day: