Hello,
When upgrading from version 3.0.18 to version 3.2.2, I experienced the following problem.
On the site, where the Russian language is installed in the back-end, and only English is installed in the front-end, category content is not displayed in the back-end. If you select English in the back side, the category content becomes available again.
My customer does not want to work with the admin area, if the English language is installed in it, so I had to cancel the upgrade of the store to version 3.2.2.
When releasing software updates, please note that the languages of the admin area and the front end may not coincide.
http://forum.virtuemart.net/index.php?topic=137512.0
The bugfix is already in VM3.2.3 http://dev.virtuemart.net/projects/virtuemart/files