I'm a Magento newbie. Just upgraded a site from 1.6.2 to 1.8.1, and now watermarks which were working in 1.6.2 are not appearing correctly on product images. (Should be in the lower right corner, and they are there, but the entire watermark is not being displayed - just the upper half of the watermark. However the entire product image is being displayed, so the issue is definitely with the watermark and not a cropping problem with the product image.) The product images are either .jpg or .png, and the watermark is a transparent .png. Where would you suggest I start to troubleshoot a problem like this? Thanks for any help you can provide.