I copied the the CSS file 'com_virtuemart/assets/css/vmsite-ltr.css' to the joomla template ( rt_juxta/css ) directory. When I go to vmart configuration ( see attached image ), and turn off virtuemart css, there are some minor changes to the store. I thought you could turn this off? I have created a custom CSS file for the template and made changes to the 'template.css' file also.
Joomla 2.5.16
Virtuemart 2.0.26d
[attachment cleanup by admin]