Hi, I tried resizing some of the images, but I'm still getting the error message. The resized images are uploaded via FTP, so the database table is untouched. Should I modify the corresponding database as well, cause I think there are tables related to image dimensions?
Also, can you tell me the possible upper limit of image size (file size or image dimensions), so that I can properly resize them? Because I have some large panaroma photos and I don't want to make them too small.
UPDATE:
I used this plugin to properly replace the images.
Enable Media Replace http://wordpress.org/plugins/enable-media-replace/
Now the replaced images appear in the resized dimensions in media library, which they didn't when I simply overwrote them via FTP. But I'm still receiving the error message.
Probably the resized images are still too large, or there are other images that are too large. I will keep trying sizing them down, but it's just good to know what the threshold is.