Found this blog about Oracle JInitiator very useful when tracking down an IE8/Jinitiator problem! Thanks for the tip – no wonder it took so long to figure it out.
The basics are that Oracle no longer supports JInitiator v1.3… So users who are forced to upgrade to IE8 are having issues as it triggers the Data Execution Prevention security feature in IE8.
To fix this, simply download Sun Java JRE (link from Nitesh’s Blog) – install, then grab the jvm.dll file from C:\Program Files\Java\jre1.5.0_13\bin\client and copy it into C:\Program Files\Oracle\JInitiator 1.3.1.XX\bin\hotspot
XX being the minor version number of Jinitiator… I found .9, .17, .21 and .22, it depends on how old the app you are trying to access is! Some people have multiple installs of Jinitiator as they use different versions for different products.. In this case copy jvm.dll to all \bin\hotspot folders.