in http://wiki.phpmyadmin.net/pma/Config#designer_coords is
said about 'designer_coords':
"Table in which to store information for the designer feature. DEFAULT: 'pma_designer_coords' "
but
if I use the setup script in http://your_host/path/to/phpMyAdmin/setup/ that is mentioned in http://wiki.phpmyadmin.net/pma/Quick_Install The default value for Designer table is said to be 'designer_coors'. If you don't pay close attention you could spend days looking for an error after realize taht it is only a matter of table name error
Fixed in subversion, thanks for reporting.