Replication:
Create 1 top level category. (Cat A)
Create a 2nd Category as a child of A.(Cat b)
edit Cat b - from the drop down "category ordering " you can select cat b....
Cat b will now vanish completely from the Category list. As it now is a child of itself. It will not be edittable
To fix: use backend mysql editor to access jos_virtuemart_category_categories .. you will see a entry that the Parent_id entry is the same as the child_id....edit the parent to 0(top level).
FIX: Do not allow admins to select a category as a child of itself.
Edit: VM 2.0.0 Joom 1.7
Thanks for the info... this should be fixed in the next release!
Thanks to you it is :-) nice idea your fix.