After installing Internet Explorer 9 RC, if you use SAPGUI 7.x, you will notice that while doing practically anything, it quits to the desktop ending even the saplogon.exe process. Which is puzzling is that there is no error message or nothing. It just disappears.
This is due to a change in mshtml.dll, which SAPGUI uses extensively for its themes. When SAPGUI passes parameters to this file, an “access violation” ensues and the application crashes.
Until Microsoft or SAP release a patch to address this issue (In SAP’s case it may be patch 5 for SAPGUI 7.20), there is a workaround: Go to SAP GUI Configuration and choose “Classic Theme”. This theme doesn’t use mshtml.dll, and so the app will work without any further issues (plus you get to experience SAP’s “retro” look once more)
Update (03/22/2011): Since Microsoft released IE 9 Final (http://www.beautyoftheweb.com/), SAP released SAPGUI 7.20 Patch 5 – Hotfix 1 (gui720_05_1-10007878.exe), which corrects this error. Download it from http://service.sap.com (with your S-id and password), apply it and you no longer have to revert to SAPGui’s “Classic Theme”, unless you have grown fond of it :)
