As the summary says, the master application will occasionally lockup hard when trying to pull up a fullscreen view or remotely control a client. This appears to happen somewhat randomly with no noticeable pattern. When the master does lockup, it locks up the entire machine and requires a hard reboot (holding down the power button) in order to get the computer working again. I checked the event log but came up with nothing conclusive.
All machines involved are running Win XP Pro SP3 and running iTalc 1.0.13