Ok, I just got my computer back up and running.
Yes, I just installed the patch and I still get kicked for excess flood whenever I set away from the Away Manager. I may go back to using build 2104 because that build still works for me. I would suggest that whatever away code you used with 2104, you use it with 2520.

For now, I guess I will just not set myself as away, either from the Away Manager or using the /away command.