I have been running 3 Ultimakers in a small shop for about 3 months now with few to no issues.
With the recent firmware release (12/04), I upgraded the firmware for all three. However, one of them, the one that's been in use the longest, has an unusual boot issue.
After the firmware upgrade process completes the first part and it reboots, the printer is stuck with "Ultimaker" on the screen, the dial light on, and the frame lights on at full brightness.
A power cycle does nothing, but a power cycle waiting 10+ seconds allows it to boot seemingly normally. In this state, network prints fail,