• When upgrading to 3.7.5.3
• When upgrading “within” 3.7 itself (for example 3.7.5 to 3.7.5.3)
  • Specifically: If your wp e-commerce theme is still located at wp-content/plugins/wp-e-commerce/themes/ you should move it to wp-content/uploads/wpsc/themes/ in order to preserve your changes
• When upgrading to 3.7 from any older 3.6 version

Read full instructions: http://getshopped.org/resources/docs/upgrades/staying-current/

Solution*: Remove any duplicate product_id rows in the wp_wpsc_product_order table in phpMyAdmin.

*This solution worked in my case. It may not work in every situation.

Running:
WordPress 3.0.1
WP e-Commerce 3.7.6.7

Problem: Shopping cart page shows up fine, and products are purchasable. But if I click on the Product’s link to go to that individual product’s page, the link just goes to a blank page.

Solution: Click the “Fix Product Group Permalinks’ link in WP e-Commerce’s back-end: Settings > Admin (scroll to bottom of page).

Running:
WordPress 3.0.1
WP e-Commerce 3.7.6.7

Just to flesh out @reikob’s solution, turn off settings>presentation on “drag and drop” and reset it to sort products by time uploaded. The ability to edit products returns.

With the selection to sort products by time uploaded, the drag and drop sort capability for both editing and displaying products remains in force. Be sure not to reorder products in the ‘view all categories’ mode – this will only apply to the unusable ‘category = 0’, which is actually nonexistent. Rather, select the category filter in which you wish the reorder to take place, and the drag and drop will work flawlessly.

Thanks @reikob!
Also, if you want to clean up the table which has in it all your previous (incorrect) attempts at ordering products, go to your phpMyAdmin. Select the wp_wpsc_product_order table, and delete all rows which have a category_id = 0.

Update from Designparc: I have found that the above fix causes duplicate products in some cases (when using the [productspage] shortcode). This is solved by removing any duplicate product_id rows in the wp_wpsc_product_order table in phpMyAdmin.

Running:
WordPress 3.0.1
WP e-Commerce 3.7.6.7

Solution: On the WP e-Commerce admin page (labeled “Store” in WordPress’s admin), click on the Products tab. You’ll now be on the Display Products screen. Use the drop-down box to select the Category that contains the products you want to re-order. Hover over the product’s thumbnail to drag-and-drop* it to a new position.

Now, go to Store > Settings > Presentation (scroll down to the Product Page Settings section) and choose “Drag & Drop” in the drop-down menu, then click Update at the bottom of the page.

*If you have used the drag-and-drop interface on the edit-products page to re-order your products then you must select the Drag & Drop option on the Presentation page. Although I’m not sure, this may mean that you’ll never be able to sort products by “name,” “price,” or “time loaded.”

Installation:
WordPress 3.0.1
WP e-Commerce 3.7.6.7

*WARNING: Do NOT copy and paste the below code into your files. Please make the recommended changes in your own files, by hand!

There are 2 files to alter.

File #1: wp-content/uploads/wpsc/themes/default/products_page.php
Line: 218

CHANGE: <span><?php echo wpsc_product_postage_and_packaging(get_option(‘wpsc_hide_decimals’)); ?></span><?php echo __(‘P&amp;P‘, ‘wpsc’); ?>:  <br />

TO: <span><?php echo wpsc_product_postage_and_packaging(get_option(‘wpsc_hide_decimals’)); ?></span><?php echo __(‘S&amp;H‘, ‘wpsc’); ?>:  <br />

File #2: wp-content/uploads/wpsc/themes/default/single_product.php
Line: 157

CHANGE: <span><?php echo wpsc_product_postage_and_packaging(); ?></span><?php echo __(‘P&amp;P‘, ‘wpsc’); ?>:  <br />

TO: <span><?php echo wpsc_product_postage_and_packaging(); ?></span><?php echo __(‘S&amp;H‘, ‘wpsc’); ?>:  <br />

Step 1:
WP e-Commerce Admin > Settings > Shipping:

• In the General Settings section, set Use Shipping to Yes and type ZIP code in the Base Zipcode/Postcode box.
• Then tick the check-box next to Flat Rate in the Shipping Modules section.
• Next, click the invisible “edit” link that’s located to the right of Flat Rate and make sure both of the Base Local boxes are empty.

Step 2:
WP e-Commerce Admin > Settings > Products:

• In the Edit Product column, in the Shipping Details section, type the shipping price in the Flat Rate Settings/Local Shipping Fee box.