Hi,
I have the opposite problem, my thumbnails are correctly sized but the big pictures are deformed.
I think the rights of the theme folder are ok, I’ve chmoded it with 777 and also tried with 755 :
wp-content/themes/wp-creativix-fr$ ls -la
total 164
drwxrwxrwx 4 root root 4096 jun 11 17:49 .
drwxrwxrwx 7 root root 4096 jun 14 09:41 ..
-rwxrwxrwx 1 root root 1071 fév 25 19:15 404.php
-rwxrwxrwx 1 root root 1509 fév 25 19:15 archive.php
-rwxrwxrwx 1 root root 3124 fév 25 19:15 comments.php
-rwxrwxrwx 1 root root 949 fév 25 19:15 footer.php
[…]
In appearance/theme setting in wordpress I get this error :
Thumbnails not working – Please give write permission to Theme (wp-creativix) Folder (755)
So I don’t understand where is the problem.
Thank you for your help.
