I have an existing FM12 file and it runs fine on FMP12 and FMP13 on the desktop.
When I try to use the FM12 file on FMGO13, I noticed the following
1. Calendar dropdown don't work. There is no dropdown
2. Scripts used to check/validate entries on the fields don't work. I have some scripts that does certain calculation/adjustment to field value depending on the input into these field. The script don't run at all.