Okay, I can reconfirm everything in the OP. Even with all seven mandatory fields (the ones under "Item Details") filled in the upload fails if all the "Item Requirements" fields are blank. Since all those "Item Requirements" fields are optional this is an error.

Also after a failed/successful upload you are taken to a completely inappropriate page:

• after a failed upload you should be taken back to the "Upload Freestuff" page with everything you entered still there, and with a banner message saying why it failed.
• after a successful upload you should be taken to your own freestuff page with a banner message saying that your item is pending approval, and that although you can see it the item won't be visible to anybody else until it is approved.

Hope that helps :)

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.

*also available in ShareCG, DAZ, and HiveWire3D flavours (the DeviantArt and CGBytes flavour have been discontinued).