I had this problem with FM12 and it continues on FM13. I have a script that reads (text to speech) a line of text just before it carries out a further action. I have found that occasionally this script stops just at the speech instruction and Filemaker crashes - spinning beach-ball of death, I have to force quit FM, relaunch and carry on.
I use this 'speak and then act' approach on several different DBs using different scripts and this crashing behaviour seems to be associated with the text to speech.
Does anyone have any thoughts on what might be causing it?