How Long Before they Log you out?

So I'm death leveling my pre character. Two hours into my 10 hour venture, I get a message that says "A new build of Guild Wars is available." My question is, how long will it be before I get logged out of the game and am forced to restart the death level?
I ask this because the message has come up before while death leveling. before my charr were ready to served, I was logged out of the game and was forced to restart it without reaping the xp. This really angered me and I was hoping to get as much xp from these charr without going over the time limit.

This was definately not a netowrking error because I am able to come back into the game after disconnecting from such error; and I was definately not able to come back to my charr after the game update.

It never forces you to restart for a new build, it does disconnect if you've been playing for nearly 2 consecutive days.

Actually. Right after the SF Nerf, I was forcefully D/C'ed after 12 hours.

Note: It also displays a message saying "You will be disconnected from the server in 1 hour" and it does a countdown every 10 minutes and a final message at 2 and 1 minute.

While Death leveling I experienced this maybe 7-8 times. First two times I didnt manage to get the xp before I got kicked. So on every other occasion a new build appeared. I would kill the charr and leave my character afk till it got kicked so I knew for sure how long I had for future setups.

And every single time it was 8 hours.