Blinking components

All the components in my CS3 .fla blink crazily when I publish my .swf. I think this is because I am targetting FP 10 from CS3…?
Can CS3 Components be made to target FP 10?
I can change the hex in the published .swf to target FP 10 ( using hex fiend on a mac) - but can I also go into the components files and change the targetting? Will this work?