I don't know why I feel strongly about this, but I do. It's like having an accented letter -- there are perfectly good reasons to leave it out sometimes, but it's still wrong.
Either Tiger Spot or tiger_spot, depending on purpose, but no tigerspot, tiger.spot, TigerSpot, Tigerspot, or other hideous mutilations. Grr.
Next up: ranting about work! and then everyone stops reading 'cause it's just a non-stop whinefest over here.