It's because the embedded browser runs with 'Enabled script debugging' option. I have Script Debugging disabled for my Internet Explorer, but the embedded plugin browser still runs with the debugging enabled.
Is there any way to disable the debugging?
Any news? Did you manage to use your webpage or you had to build another one specific for the vSphere Client with its embedded Internet Explorer?
I am facing the same problem here.
Have you got any solution for this problem , I am also running into the same issue.