I added a link to manage your account in the front end, when I visit it this is what I get
Class 'VmHTML' not found in G:\Websites\LocalUser\<domain>\administrator\components\com_virtuemart\helpers\mediahandler.php on line 1111
2.5.6 Joomla and 2.0.8e of VM
Any ideas what is happening there?
This is fixed in svn. you visit this page as admin and therefore it tries to show your shop image. But this feature is just not completly written. it wont harm your store, only you see it.