Two bugs: After disabling sight for all tokens, to simulate magical darkness, the players could still see all other tokens (and some other things, like a "wall" built using SmartAoE). Here is a player's screenshot: However, if I (GM) selected a token and pressed ctrl+L, it only showed that token and nothing else (that is, as it should be for the player controlling the said token). So, one bug is that it is impossible to hide certain things from the players. The other is that ctrl+L does not actually show what the person controlling the token sees. I've been using roll20 for eight years, and my general impression is that it gets consistently worse as time goes by. It seems as if it had started with awesome devs and has been getting highly unqualified ones since then.