IGN: SKSoccer Bug: Just a really quick bug, doesn't even require format or anything. When I /v or /vanish I used to get a side bar in my inventory screen telling me I was vanished. It was in the same spot strength or regeneration affects were. Now, this does not appear.
When you go into your inventory, to the left are current potion effects. (If any.) I believe it used to be that when vanished, the server would put the "invisibility" potion effect on the player, so when the player opened the inventory while vanished, it would have "invisibility" on the left as a cool little thing that helped the player know when vanished. I think it might have been purposefully removed, because the invisibility effect is actually used as of 1.4, so it could cause issues.