Hi,
Yes, i also noticed the slideshow failure in Chrome browser. I will deeply look at it.
But i should mention that, the "slideshow" is not a part of DarkMArt, it is not integrated, it is a freeware joomla module and can be downloaded separately through here:
flexiblewebdesign.com/Virtuemart-Extensions/Flexible-3D-Picture-Slideshow
(this is why there is a separate installation file in the "One-By One" folder for 3d Slideshow module)
So actually it is not a DarkMart issue but instead "Joomla 3D Slideshow" issue. For now, You can uninstall the slideshow module and find an alternative one until the issue is fixed. But i will take a look at it more deeply. It might be related to cache. I can't be sure now.
About the <? typo issue. I glad you noticed that. it was an innocent typo issue and i just fixed it. Thanks for letting know. The reason why i haven't noticed that before, because both my local machine and the flexiblewebdesign.com uses short_open_tag=1
But some servers don't enable this parameter by default to avoid possible confusion with <?xml, which makes sense.
Regards.
Support & Development.