1. How do I make smileys?  
2. How do I make a copy of the screen (screenshot)?  
3. How do I clear the Java cache?  
4. How do I reinstall Java properly?  
5. How do I add my own picture to my profile?  
6. How do I remove my (old) player names?  
7. How do I remove that annoying flashing triangle!  
8. How do I disable the Offload checksum  
9. How do I make a copy of the contents of the Java Console?  

4. How do I reinstall Java properly?

Reinstalling Java sometimes fixes strange problems people are having with the games. The best solution for this is removing all old versions first and then installing the latest version.

Before uninstalling, restart your PC, and don't start any Java and/or Internet Explorer/Firefox/Opera programs.. This will guarantee no Java program is running when trying to uninstall.

Go to the "Add or Remove Programs" option in your Windows Control Panel (Configuratiescherm->Software for dutch Windows). Remove any occurence of Java (JRE/JDK).

Reboot your PC again. Download the latest Java from www.java.com and install.