Hi,
for me your tour works in all browsers...
BUT - I would recommend avoiding full url paths like 'http://www.bluespringsmip.com/2015/images/icon_i_white.png' !
When you run your tour on 'http://bluespringsmip.com' (without the 'www.') and access that file, you will have an unnecessary cross-domain access.
If you really need to use absolute paths, then better use server-absolute paths like '/2015/images/icon_i_white.png' (or even better just relative paths).
Best regards,
Klaus