[K12OSN] opening too many programs blanks screen K12LTSP

[Jim Kathan]

something changed on my K12LTSP where if a student gets impatient waiting for a program to open and double-clicks childsplay or tuxtype too many times, the screen just turns black; you have a mouse that moves around but nothing else but a black screen. This just recently happened. Its a nightmare because the kids click way too many times and then it crashes and the only way to fix it is to turn the thin client off and turn it back on. Any ideas what happened?