I was getting the message on the options page "Please chmod wp-content/themes/flexis/modules/cache folder to 777 for the auto creation of thumbnails."
I went to my FTP and changed the settings to 777 and I'm still getting the message and the thumbnails are still not showing. I then deleted the theme, did a clean reinstall and changed the settings again to 777. No Luck.
I'm using Cpanel Host Gator Hosting and running Wordpress 2.9.