All my products have mandatory options, the one product on the test site doesn't have any.
My Modules are: (left out most of the mandatory/core modules)

Access Control
ACL 6.x-1.0-beta3 Access control list API. Has no features on its own.
Forum Access 6.x-1.0-beta1 Allows forums to be set private and allows forums to be given moderators.
CCK
Content 6.x-2.1 Allows administrators to define new content types.
FileField 6.x-3.0-alpha6 Defines a file field type.
ImageField 6.x-3.0-alpha4 Defines an image field type.
Core - optional
Color 6.9 Allows the user to change the color scheme of certain themes.
Comment 6.9 Allows users to comment on and discuss published content.
Contact 6.9 Enables the use of both personal and site-wide contact forms.
Database logging 6.9 Logs and records system events to the database.
Forum 6.9 Enables threaded discussions about general topics.
Help 6.9 Manages the display of online help.
Menu 6.9 Allows administrators to customize the site navigation menu.
Path 6.9 Allows users to rename URLs.
Profile 6.9 Supports configurable user profiles.
Search 6.9 Enables site-wide keyword searching.
Taxonomy 6.9 Enables the categorization of content.
Tracker 6.9 Enables tracking of recent posts for users.
Update status 6.9 Checks the status of available updates for Drupal and your installed modules and themes.
Upload 6.9 Allows users to upload and attach files to content.
ImageCache
ImageAPI 6.x-1.2 ImageAPI supporting multiple toolkits.
ImageAPI GD2 6.x-1.2 Uses PHP's built-in GD2 image processing support.
ImageAPI ImageMagick 6.x-1.2 Command Line ImageMagick support.
ImageCache 6.x-2.0-beta5 Dynamic image manipulator and cache.
Other
FCKeditor 6.x-1.3-rc7 Enables the usage of FCKeditor (WYSIWYG) instead of plain text fields.
Frequently Asked Questions 6.x-1.8 Manages configuration of questions for a FAQ page.
Login destination 6.x-2.3 Control where users are directed to once they login.
Site Documentation 6.x-1.2 Displays various pieces of information about this Drupal installation.
Thickbox 6.x-1.1 Enables Thickbox, a jQuery plugin.
Token 6.x-1.11 Provides a shared API for replacement of textual placeholders with actual data.
Upload path 6.x-1.0 Organize uploaded files according to admin-specified rules.
User registration notification 6.x-1.10 Notifies administrator of new user registrations.
Ubercart - core (optional)
Attribute 6.x-2.0-beta3 Allow the customer to choose attributes for a product at checkout.
Catalog 6.x-2.0-beta3 Display a hierarchical product catalog page and block.
Payment 6.x-2.0-beta3 Defines an API to let payment modules interact with the cart.
Reports 6.x-2.0-beta3 View reports about your store's sales, customers, and products.
Shipping Quotes 6.x-2.0-beta3 Retrieve and display quotes for shipping products.
Ubercart - extra
Product Kit 6.x-2.0-beta3 This node module represents two or more products that have been listed together. This presents a logical and convenient grouping of items to the customer.
Ubercart - fulfillment
Flatrate 6.x-2.0-beta3 Assigns a flat shipping rate to products.
Ubercart - payment
Payment Method Pack 6.x-2.0-beta3 Provides the check/money order, COD, and 'other' payment methods.
PayPal 6.x-2.0-beta3 Integrates various PayPal payment services and IPN feedback.