[Plugin: WP e-Commerce] WP e-commerce 3.8.7.4 incompatible with WP 3.2.1

I did something that I should have done first, apologies, and that is to set define('WP_DEBUG', false); to define('WP_DEBUG', true); in wp-config.php
That’s where I found what the problem was in my case: “Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 122880 bytes) in (…)”
Which means a memory_limit in my php.ini file that was set too low for wp e-commerce to work. Since my webhost doesn’t make the php.ini file accessible as standard procedure, I had to contact them. Once they changed it (I asked them to change it to 64M) the problem was resolved.