I think I'm having a similar problem with imagecache.

I create a product and add an image. The image displays in the node just fine, but I got an "n/a" in the category list for the image column (the tables with the headers of Image, Name and Price).

I checked my server files and the image is being uploaded into default/files/products and there is nothing in default/files/imagecache. The files and imagecache folders have permissions set to 0777.

I set up ubercart several months ago in a test environment and imagecache works fine there. I have several folders under imagecache representing the various sizes of images.

I did notice that the imagecache presets on my production site were never set up even though I have image support turned on in ubercart. I set up some presets and then re-uploaded my image in the node and I'm still not getting images to show in the category list (but they show up in the product node just fine).

Can anyone offer suggestions?