I noticed that also.  It does happen occaisionally on the venture.  Last 10 trades today [180K after hours]

 

Time X Price Chg Vol Buyer Seller Markers
16:27:18 V 0.38 -0.02 9,000 9 BMO Nesbitt 1 Anonymous K
16:27:18 V 0.38 -0.02 91,000 33 Canaccord 1 Anonymous K
16:27:03 V 0.38 -0.02 25,000 9 BMO Nesbitt 1 Anonymous K
16:26:15 V 0.38 -0.02 55,000 9 BMO Nesbitt 1 Anonymous K
15:59:25 V 0.38 -0.02 3,500 9 BMO Nesbitt 13 Instinet K
15:59:20 V 0.38 -0.02 7,500 9 BMO Nesbitt 13 Instinet K
15:57:01 V 0.385 -0.015 6,500 62 Haywood 13 Instinet K
15:50:49 X 0.39 -0.01 1,000 9 BMO Nesbitt 1 Anonymous K
15:50:49 V 0.39 -0.01 3,000 9 BMO Nesbitt 13 Instinet K
15:50:49 V 0.39 -0.01 1,000 9 BMO Nesbitt 1 Anonymous