Solution : https://service.sap.com/sap/support/notes/687554 (SAP Service marketplace login required)
Key words :
folder irj\servlet_jsp\irj\root\portalapps\, <id1>_<id2>_<browser id>, stylesheet named<id1>_<browser id>, stylesheets named <id1>_<browser id>, subdesignparts ursache und voraussetzungen, installing service pack 2 patch 3, exist stylesheets named ur_dn_ie5, stylesheet families thatdo, rendering portal pages, lafservice\themes\portal
Related Notes :
| 589013 | EP 6.0: Central Note for Themes and Theme Editor |