Imagefield upload won't complete with ecommerce

Hey,

I just installed ecommerce last night and it looks pretty sweet, however it seems to break something with imagefield. When uploading an image, when upload is pressed, nothing happens. The blue circle goes around once and there's no change. Upon saving the node, the image is actually saved (so it goes through), but you would never know until you've saved the node and viewed it. On the add/edit page, no thumbnail appears, etc, just does something for a second and it looks as if nothing has changed. (When the module is disabled and uninstalled, the normal imagefield functionality returns to normal. When re-enabled, the imagefield breaks again.

When imagefield breaks, it breaks sitewide, not just on commerce nodes. Any node where imagefield is attached as a field experiences the problem. When e-commerce is disabled and uninstalled, the functionality returns sitewide.

I opened up the entire site with admin privlidges (it's a fresh install) to anon users so you can see for yourself. The link is here:
http://www.cameronmacpherson.com/dev/admin
Add a product (ecommerce) to see the imagefield problem:
http://www.cameronmacpherson.com/dev/node/add/product/tangible
Add a CCK node to see the imagefield problem:
http://www.cameronmacpherson.com/dev/node/add/bookitem

I'd love to use ecommerce but my clients can't use it if the image uploading field is broken. Can you take a look to see what the problem might be? I would very much appreciate it.

Thanks!!