I'm trying to migrate a WP install using default export and import tool. Everything is peachy except featured images.
For my post thumbnails I'm using default Featured Image option with 7-8 predefined image sizes in my functions.php.
Problem - after importing, Wordpress is just putting original picture in img src for thumbnail. Not resized one as is should be, but largest one which was uploaded originally.
This is not even an option, because there are over 2000 posts, but I can't even fix this by setting featured image again by selecting image from media library -- I have to upload the image again, and then it works.
I guess import/export tool doesn't save all the settings/metadata it should, but I can't figure out how to solve this.
Image files (original and resized ones) are on server and in proper folder, and code is set up properly as well.