Nr 1This bug can only be exploited when a game is in progress.
When you step trough the portal and enter the waiting-room you'll get the option to join the match, this message refreshes itself constantly when you click somewhere else or simply press 'no'.
The actual problem happens when you exit the waiting room. The option to join the ongoing game is still there when you exit like it is here:
If you press 'Yes' you'll technically be in the game as a player, but you're free to do whatever you like outside of CW. Like teleporting to Falador and start trading or fighting other monsters without it affecting the fact that you're still recognized by the server as a participant in the current CW game (look to the left upper corner).
Nr 2When you minimize your Emps-World client it crashes, I do not know if this problem only occurs for me, but I can provide system, java and client specs if needed. As far as I know everything is up to date.
EDIT: This only happens from time to time and is not guaranteed a crash, it is random.
Nr 3There are spots around the world, usually at places that are less visited where you can get stuck. An example is the windmill north of Ardougne which doesn't let you gown down to the first floor once you're on the second floor. This however is not a big problem since you can teleport out.
Location of the mentioned windmill shown on the map:
Nr 4
A graphical bug on any entity that displays the entity wrongly. Some examples are trees that are cut down but show them as they are still there as fully grown trees or ores that have been mined but is still displayed as not mined
