I had big problems due to wordpress update 3.4. After the update there was no single thumbnail working anymore.
Now I deleted all the broken thumbnails, which just were 1x1px plain images. I did this for 13.000 posts.
Then I wanted to re-create all of the thumbnails by just clicking "Generate posts thumbnails" - this worked for me very well in the past.
But now - nothing happens any more when I click on the button, there just appears a white area below the headline "Generate Posts Thumbails" and the page stops loading. Is it because there are too much posts?
How can I get the plugin working again?