I've read a lot of issues concerning thumbnail creation but not exactly what is happening to me.
After I've uploaded and selected all the photos I want to add in my category in the multiple add tab, I select the category and save.
Then the thumbnail creation starts.... And very often stops after a short while, leaving half or more of the images with a blank Thumbnail and I'm unable to view these images on my webpage.
If I go to the admin images part and show all images normally it will start recreating the thumbnails and fix my problem but if I don't pay attention to the thumbnail creation from start to finish or don't review all the images on my website after upload I might not realize something went wrong as no error message is displayed.
Do you know why this happens? Any way to fix it?
Happens both on my live website and on my local copy using MAMP, so not a connection problem..

