Solution : https://service.sap.com/sap/support/notes/1132685 (SAP Service marketplace login required)
Key words : 
release support pack470 sapke47082500 sapke50048600 sapke60031additional information, select 'font attribute bold' check box, select 'font attribute italic' check box, 'true type font installation forsapscript/smartform, executing payment summary generation report, 'true type font installation, 'true type font install, payment summary generation report, truetype arial font reason, truetype arial font files
Related Notes : 
       
| 1373065 | Problem w/ PostScript printing w/ "too large" TrueType fonts | 
| 1098345 | PAYG: Payment summary and ETP summary ("Times New Roman") | 
| 1030460 | Incorrect print screen when printing SAPscript forms | 
| 822379 | Known problems with Support Packages in SAP NW 7.0x AS ABAP | 
| 782140 | OCS: Known problems with Support Packages in Basis Rel. 6.20 | 
| 672651 | OCS: Known problems with Support Packages in Basis Rel.6.40 | 
| 201307 | TrueType fonts for Smart Forms or SAPscript |