Earth API integration not working on IE 8

Demo link or sample code:
http://google-maps-utility-library-v3.googlecode.com/svn/trunk/googleearth/examp
les/earth.html

What steps will reproduce the problem?
1. Load that URL on Internet Explorer 8
2. Click on the "Earth" map type button
3. Doble-click on the warning icon in the status bar to see the (attached) JS 
error:
'undefined' is null or not an object
googleearth-compiled.js
Line: 5
Char: 24

Expected result:
The Earth API plugin should show the same viewport, like it does in other 
browsers, i.e. Google Chrome.

Actual result:
As stated above, there is a JavaScript runtime error and the Earth API doesn't 
take over.

Version: 1.0

Browser / Operating System:
Internet Explorer 8 on Windows 7

Additional comments:
This was reported originally at 
http://code.google.com/p/gmaps-api-issues/issues/detail?id=1480 -- I just 
noticed there was no issue filed here accordingly.

Original issue reported on code.google.com by mig...@gmail.com on 12 Apr 2011 at 3:17

Merged into: #75

Attachments:

earth-maptype-ie8.png

loftywaif002 / google-maps-utility-library-v3

Earth API integration not working on IE 8 #80