Filemaker Pro 126.96.36.199, Windows 10 64 Bit.
On some Windows 64 bit machines it will not save pdf's via the script step once upgraded to this version. Have attached a screen capture of the error message. The problem is fixed once you uninstall Filemaker and Reinstall with version 188.8.131.52.
Sub issues, not present in Filemaker 14:
1) Have complains from users that PDF's are very slow to open on Tablet devices running Adobe Reader and seems to drain the battery.
2) PDF documents with a black background on the page gets white lines between records.