We have updated one of our customers Wp-Ecommerce plugin. We found that the products categories where sortable using drag and drop. The fact is that feature does not save the order you set using it.
The fix is really simple, but it is so difficult to have a single line of code (even if its a fix) included in Wp-Ecommerce that we publish it here. Fortunately, the fix doesn’t need to be applied to core files.
To fix that issue, simply paste that code in your active theme’s functions.php file: