Marfitalu: One of the games you and I played had an ugly seki (my fault for not stablizing a group early enough:

http://brainking.com/en/ArchivedGame?g=1678903

In this case, it's actually one move away from being seki, which is still seki. If either the white group at K3 or the black group at K4 place a stone on their shared liberties, no further stones can be placed by either color.Since all surrounding groups are stable (or very likely to be) this would be seki.