if its a crash you should look into /var/crash directory and look for the file including the name 'compiz' in it, double click it and follow the onscreen instructions to report a new crash report which hopefully will have logs about the crash and could possible turn out to be a duplicate of an already reported crash report.
if its a crash you should look into /var/crash directory and look for the file including the name 'compiz' in it, double click it and follow the onscreen instructions to report a new crash report which hopefully will have logs about the crash and could possible turn out to be a duplicate of an already reported crash report.