Solution : https://service.sap.com/sap/support/notes/975872 (SAP Service marketplace login required)
Key words :
relevant backend support package, relevant sap gui patch, sap gui code, terms html control, sap gui 620, sap gui 640, html control, html viewer, symptom postdata, proper conversions
Related Notes :
| 1008717 | HTMLViewer: Postdata of length more than 255 gets truncated. |
| 896268 | Display problems with the PI sheet |