Solution : https://service.sap.com/sap/support/notes/1538540 (SAP Service marketplace login required)
Key words :
pure browser/reader communication protocol, sap web dynpro applications, prerequisites adobe reader 10 introduced, feature called protected mode, edit/preferences dialog, reader 10 protected mode, enable protected mode, symptom acf applications, adobe reader, adobe reader 10
Related Notes :
1098009 | Web Dynpro ABAP - List of known Restrictions and Browser Support |
834573 | SAP Interactive Forms by Adobe: Acrobat/Reader version |