Hi,
I visited the site last night with an HTC S701 which runs windows. I got a message that said I was using an old browser, so I did not think that it was worth reporting. But this morning I see that there is a mystery, and I think that that message could shed some light.
The message I got was
Unsupported Browser
We have detected that you are using Internet Explorer 6,
and then it goes into great detail as to why I should update my mobile.
I looked up the message (searched the MJ code) and I do not think it is coming from MJ.
So I looked, in Google, to see if there was anything that linked Rockettheme to IE6 and found this
demo.rockettheme.com/jan09/index.php?option=com_content&view=article&id=58&Itemid=65
So it looks to me as if there might be a conflict between MJ and Rockettheme. As this is a test site, perhaps you could use one of the included Joomla templates and MJ, just to see if the problem remains? And then if it goes away at least you know which part to investigate further.
Hope that helps.