Thanks for this - yes it does have a monitor connected, its a mac mini with a screen for display in a gallery.
I made this app for an artist and he now has it running in 8 or 9 places (galleries/collectors houses) and he has so far had this problem with just one of the setups so i guess it could be because of the particular screen setup used. We have now reinstalled the app on the setup which crashed and Im waiting to hear if there are further problems.
One other thing - the artist has actually sent me two crash logs - they are identical and Ive just noticed that Time Awake Since Boot is 63000 seconds in both - does that suggest anything to anyone ?
finally what do these parts mean;
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY