You must be very skeptical about the Virtuemart Updates. Because after Virtuemart updates, you would also need to update the DarkMart as well.
(it is not the case for Joomla, you are safe to update Joomla to 2.5.xx when a new version comes out)
After each Virtuemart updates, we are also updating our templates to make them fully compatible with the new Virtuemart release.
Navigate to VM Configuration > Template
And make sure you have these settings:
Attachment ScreenShot2014-05-09at7.00.34PM.png not found
TIP: Disable "Use external google jQuery library" because if you enable that, it will load jQuery1.8.x which is pretty new version for the Zoom Effect of DarkMart template. To run the Zoom Effect that comes with the DarkMArt the jQuery must be either jquery1.6 or jquery1.7
FYI: We have also updated the Zoom Effect, it is now working with all jQuery versions starting from jQuery1.6 to jQuery2.xx but the zoom effect comes with the DarkMArt requires jquery1.7 or jquery1.6
If you insist on loading jQuery library from the external sources (from Google API) and you can use this plugin: Jquery Easy
and choose jQuery1.7 from the plugin settings.
More info: www.flexiblewebdesign.com/forum-virtuemart-2-template-puremart-support/523-the-easiest-way-to-solve-jquery-conflict-issues