Sharp ROM instability

I have no reason to think this is because of zaurus-debian, but has 
anyone else had problems with stability?  Now several times I have had 
the graphics mess up, completely locking the zaurus.  Every other 
vertical column of pixels appears to turn white, like what happens the 
moment before the zaurus is rebooted (which is normal I'm assuming, the 
screen just powers down temporarily during a reboot, no problem).  This 
has happened once while in the zaurus-debian environment but I am 
definitely blaming the Sharp ROM.  In this state, pressing practically 
any combination of 2 or more non-thumbboard buttons (i.e. Action, 
directions, calendar, contacts, menu, mail) will suspend the zaurus.  
Pushing Cancel  / On/Off brings the zaurus back up.  The situation does 
not improve until after I've rebooted or done a hard reboot if it 
actually freezes.  This sound familiar to everyone?  I'm using a 5600 
with the Sharp ROM v1.32

Steve