and if possible the version of the Browser?
If the question was also for my input then I tested with IE8 and Google Chrome 10.0.648.151
Having checked I can now open as expected such that I can go on to customize. However couple of issues:
1. on saving the new template the thumbnail created to display the new style does not reflect the changes.
2. When recalling the newly created template it does however open looking as intended but does open with errors:
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; InfoPath.3)
Timestamp: Fri, 18 Mar 2011 00:47:37 UTC
Message: Syntax error
Message: 'lang.contextmenu.options' is null or not an object
Message: 'console' is undefined
Also it informs you that you appear to still be customizing a theme, however after cancelling and reopening I could no longer repeat this error message althouth the 'with errors' message still exists.