So far, it looks like Virtuemart 2.0 isn’t quite ready to hit the production servers just yet. 
While the package looks especially smooth and sleek running in a Joomla 1.7.3 install, and most of the functionality of version 1.9 is still there, it seems that people are waiting for a plugin to be finished that solves some glaring issues.
Number one, seems to be that there is no download configuration options available in 
the admin panel of release 2.0. Not very helpful if you want your online store to be able to sell downloads, or even give ’em away for that matter.
In the meantime, we’ll stick with Virtuemart 1.1.9, since it seems to have worked so well for so many.
In the meantime, until the plugin for downloads comes out; Holding our breath…
Additional notes on CSS styling:
REMOVE ‘Availability’
/components/com_vmart/themes/default/theme.css
Display none for .availabilityHeader
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REMOVE ‘Usually Ships In’
Clear out ‘Availiability’ datafield.
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http://www.inforats.com/optimize-your-mysql-database-clear-overhead/
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`re:Mootools Upgrade plugin is disabled. Enabling it to test it, cause virtumart to lose its way; after clicking add to cart, it refreshes to a strange unknow url/page.
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http://www.rockettheme.com/forum/index.php?f=394&t=100259&rb_v=viewtopic
disabling lightbox pack in header.html for debugging
mootools in system is 1.12
all fruitless, working vm configuration/theme options
Joomkit
Solved: Delete/update problem in Virtuemart Cart
« Reply #2 on: December 18, 2008, 06:54:56 AM »
the file is basket.php
Change administrator/components/com_virtuemart/html
line 133 /* UPDATE CART / DELETE FROM CART */
Code: [Select]
$action_url = $mm_action_url.basename($_SERVER[‘PHP_SELF’]);
change to ;
Code: [Select]
$action_url = ‘index.php?page=shop.cart&option=com_virtuemart&Itemid=’.$sess->getShopItemid();
Shame cant be done in template without hacking core….
hope this helps
Tested on Vm 1.12 Joomla 1.5.8