ESRI ArcGIS 9.x and Internet Explorer 7

ESRI ArcGIS 9.x does not work with Internet Explorer 7.

ArcGIS 9.1 will not be patched to work with IE7.

ArcGIS 9.2 currently does not work (as of 27 November 2006) and will be patched.

The current recommendation is to stay with IE6 and do not install IE7. If your users have installed IE7, please uninstall it.

ESRI knowledgebase article: here

Per UC Irvine’s Tony Soeller on 27 November 2006:
ArcGIS software will not work if Microsoft’s Internet Explorer 7 (IE7)
is installed on your computer. That is the official word from ESRI.
ESRI says that ArcGIS uses DLLs (Dynamically-Linked Library
programs) from IE and the new DLLs that are installed with IE7 will
render ArcGIS inoperable.