Surcharge feature for the PayPal payment method which can be turned On/Off and can be configured.
Ability to calculate tax before/after shipping was added to the order total.
Realex payments ACCOUNT value configuration setting for sub-accounts. Defaults to “internet”.
Page template settings for products, categories and suppliers in configuration section.
Page template setting for each individual product, category and supplier to override global settings.
Button/link in ‘Orders’ section to delete the credit card details of a user from the database when Manual POS was used.

In the ‘Products’ section, the Options of a Style didn’t display when a Style was ticked for the Add/Set Styles bulk actions.
Prices didn’t show up on the front-end for Style Options when a Style with checkboxes was used.
Payment method(s) setting boxes were inappropriately hidden from the configuration section.
“Go and add” shipping methods link was broken in the ‘Configuration’ section.
PayPal tax was calculated twice when discount coupons were turned on.
“Get Support” link on the ‘Overview’ page was going to the wrong place.

WordPress 3.0 Compatibility!
For CSV product import, the PHP mime_content_type function won’t be used if it is not available on the server as a PHP extension.

Newsletters v3.8 Release Notes

Display custom fields of a subscriber in the admin email notification.
When exporting to a specific list, you can choose whether to export all-, only active- or only inactive subscriptions.
POP/IMAP mailbox bounce feature to handle bounced emails at a configured interval.
‘Check Bounced Emails’ button in the ‘Subscribers’ section to check the POP/IMAP mailbox at any given time.
Delete subscriber on specific bounce count. You can specify a number, for example, on the 3rd bounce to a specific subscriber, it will be deleted.
Global email priority setting (High, Normal, Low). Your recipients will see the priority in their email clients.

ID values of elements starting with numbers prevented XHTML validation.
Shortcode/embedded subscription form with Ajax turned off had a problem with posting to the correct URL.
Emails didn’t queue when an email attachment was uploaded/added.
Editing the title/name of a custom field broke its slug and as a result, the ‘Subscribers’ section.
Fixes to custom fields values, checkboxes and several sections due to an attribute escape and stripslashes bug.
Editing a subscriber didn’t pre-tick/select its existing lists since v3.7.8
Return-Path header for bounce handling when using the WP Mail function wasn’t added.
Shortcode for subscription form with muliple choice “checkboxes” didn’t work while “multiple” worked.
Require activation not required didn’t work for subscriptions through the WordPress registration page.

Default theme is now the checked radio button instead of NONE.
When sending the first/latest newsletter to new subscribers, the History theme is now used rather than the default theme.
When a subscriber unsubscribes its current email(s) in the queue for that list(s) should be removed as well.

Checkout v1.4.1 Release Notes

eWay (Shared) payment method. (docs)
Setting to turn off new user registration notification during checkout in ‘Contacts’ step.