Win32: Plugin demos fail in Netscape 6 when both NS 6 and NS 7 are installed

Platform : Windows - 32 bit
Bundles : j2sdk.exe, j2re.exe, j2re-i.exe
Build: mantis 1.4.2 build-02
Location : /java/re/jdk/1.4.2/latest/windows-i586
Test Case: Clean install of SDK/JRE
Reproduced in: Windows 2000 Prof (SP2 & SP3), Win98 SE, Windows XP Prof

DESCRIPTION:
When Mantis SDK/JRE is installed on a machine with both Netscape 6x and Netscape 7, plugin demos fail in Netscape 6x (Plugin is not registered). The browser tab in control panel shows netscape 6 as selected. Even on deselecting and re-selecting it, demos fail in Netscape 6x.
This problem as also been observed when mantis is installed on a machine with Netscape 6x & Mozilla 1.x. Here too, plugin demos fail in Netscape 6x. But, in the Control panel, Netscape 6 is unselected. On selecting (registering) Netscape 6 in the Control panel, the following error message is thrown.

"Unable to change browser settings. Please check that Netscape 6 is properly installed on the system &/or that you have sufficient permissions to change system settings"

How To Reproduce:
1. Install Netscape 6.2x
2. Install Netscape 7 (make sure NS 7 does not over write NS 6) or Mozilla 1.x
3. Install Mantis SDK/JRE
4. Run Plugin demos in Netscape 6.2x

Note: This problem has also been observed with Hopper fcs.


###@###.### 2002-10-15
This problem is still present in the new IS7 Installer.
This problem is not observed if netscape 6 is installed over Netscape 7.