Solution : https://service.sap.com/sap/support/notes/1626665 (SAP Service marketplace login required)
Key words :
browse theme data base, ie9 treats http responses, microsoft internet explorer 9, -recognized mime type, compatibility mode, show details, png' items, png reason, header tag, text/plain
Related Notes :
| 1458799 | Limited supportability for Internet Explorer 8 & 9 |