Memory exhausted in Classifieds

I'm experimenting with a new install of Classifieds 1.1.1, but am getting this memory exhausted errors when I try to publish or save an add: "Allowed memory size of 33554432 bytes exhausted (tried to allocate 2000 bytes) in .../mu-plugins/classifieds/classifieds-core.php on line 321".
I've set memory limit to 128 in the htaccess file.
Any ideas?