I use Nextgen to add a white border frame with a logo as a watermark. Both the pictures in the galleries (between 2MB and 8MB) and the watermark (128KB), are always 4368x2912 pixels. On a local system (memory_limiet 32MB), this works perfectly. When migrating to my online version (memory_limit 128MB) the watermark won't set. The preview image breaks when updating the URL of the watermark. When trying to add the watermark to the pictures, a failure occurs.
When i reduce the watermark in size for 200pixels, it does load... Problem is, i can't change the dimensions of the images. These have been set by the client.