Solution : https://service.sap.com/sap/support/notes/894389 (SAP Service marketplace login required)
Key words : 
fill concatenated floating type text fields, restrictions potential data security issue due, sap netweaver 2004s - adobe document services reason, restrictions browser supportwhen activex components, sap netweaver 2004s limitations existed, dynamic pdf formssap strongly recommends, integrate smart forms text modules, solution xx-part-adb, temporary internet files directory, xx-part-adb release
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| 735050 | Output of forms (was changed) |