[stagshop]

We're having the same problem on our site. We recently upgraded, and I went into the Appearance Options earlier today to fix something else unrelated, and it forced me to input a value in the "Product Width" field (couldn't be blank, or zero).

Our thumbnails are varying in size, however I did standardize a sizing for them (max 120 pixels wide AND max 100 pixels high), but now that the width adjuster thing is active, the tall thumbnails are way too large and the wide ones are too small.