After I upgraded to 3.4.2 version, I can’t set thumbnail image in feature images. it notices “could not set that as the thumbnail image. try a different attachment”. I tried disable all plugins, but it’s not fixed. please fix it help me ? thanks so much.
I can upload images in feature images, but when I make thumbnail, it doesn’t working. it notices “could not set that as the thumbnail image. try a different attachment.”
I still changed themes to Twenty Eelven and disable all plugins, but it haven’t fixed.
I just had a similar problem, probably due to a forced server reboot after it had hung. I repaired the wp-database and everything worked nicely again after that.
To resolve problem I have try to prepare database in PHPMyadmin, after that it works correctly for me. If you have same problem you should try to do like me.