by borka » Tue Jun 11, 2013 7:16 pm From my experience, my char stayed logged in for 4+ hours before i had to kill java.
viewtopic.php?f=2&t=22664
The HnH window went completely white
that's sounds more like a client freeze/stall of client where it didn't close properly and thus there was no logout "command" to the server - i had that happen sometimes too in W5
