If you have a 64-bit OS you'll notice the command prompt stays open with the client and closing it will close the game client. This annoyed me because it took space on the task bar so here's a quick fix (probably a better way to do it though).
Right click the "
3. Run 64bit.bat" file and click "
Edit", you will see this:
@echo off
title Client
"C:\Program Files (x86)\Java\jre6\bin\java" -Xmx500m Gui 30 0 lowmem members 32
exit
Delete that and replace with:
@echo off
title Client
ECHO (You may now close this window)
"C:\Program Files (x86)\Java\jre6\bin\javaw.exe" -Xmx512m Gui 30 0 lowmem members 32
exit
Now save it and close. Re-load your client if it is already open.
Not much of a change really, but now when you close the cmd the client will stay open.
Enjoy
P.S. This should fix the 'Windows cannot find javaw' error too!