Solution : https://service.sap.com/sap/support/notes/1462523 (SAP Service marketplace login required)
Key words :
info/2009/07/22/run-separate-isolated-ie8-window-frame-session-, uk/dominicz/archive/2008/11/20/internet-explorer-8-ie8-, \program files\internet explorer\iexplore, ie7 instances started independently, prerequisites sap nw portal, start -> run menu, separate session cookie, ie8 solution ie6, sap nw portal, effects portal sessions
Related Notes :
| 1458799 | Limited supportability for Internet Explorer 8 & 9 |
| 858924 | ctrl+N functionality in the portal |