For the credit card details not showing up, that may have something to do with your browsers pop-up settings. I was also having problems with it not showing up in IE. I took out the height and width settings in the link and it worked fine. Using version 1.3, it was line 209 it was this…
<a href="#" onclick="window.open( '<?php echo $_SERVER['REQUEST_URI'].'&wpsc_admin_action=view_creditcard'; ?>','height=300, width=800' ); return false;"><?php _e( 'View Credit Card details','vl_wpsccc' ); ?></a>
and I changed it to this, just taking out ‘height=300, width=800’
<a href="#" onclick="window.open('<?php echo $_SERVER['REQUEST_URI'].'&wpsc_admin_action=view_creditcard'; ?>' ); return false;"><?php _e( 'View Credit Card details','vl_wpsccc' ); ?></a>
That was in the wp-e-commerce-offline-credit-card.php plugin file.
