When I Open a page in my intranet portal, I get a window with the following message
FRM - 92095: Oracle JInitiator version too low. Please install version 1.1.8.2 or higher
I have installed JInitiator 1.1.8.16 and JInitiator 1.3.1.30. But I get the same error message.
Any solution to this???

Don't uninstall anything !
You can use Java7 in Windows or Mac
In Control Panel of Java
click Java click view in version7 Parameters write:
-Djava.vendor="Sun Microsystems Inc."
It works !