The pdf is flattened, the flatten option is set.
The issue on safari is the the web page does not reload correctly, the pdf does download and is viewable but the web page fails to reload correctly. It seems to sieze when it reaches the formidablepro2pdf code after download.
I have pasted the automatic download link in the success message of formidable forms.
The issue on iphone is different – the pdf fails to download completely