Hi @emaildano
Thanks for the attached xml. I can see that your flexible content filed contains a lot of sub fields and sub field data!
it is most likely the size of this array which is causing the save function to break.
The good news is that this issue wont occur in ACF5, however this is a few months away from release…
Perhaps for now, you will have to simplify your flexible content field, or upgrade your servers vars / PHP memory.
Thanks
E
