Moderator samboll posted this on another closed thread,
"If you're going to make a quick change, you could do 777 - but that is not secure at all, so change it back. In fact, whatever you use, when finished you should CHMOD all files to 644.
Posted: 2006-04-06 00:42:04 #
http://wordpress.org/support/topic/67919?replies=6"
I had the plugins and themes folder set to 777, but when I set it to 644, the template thumbnails stopped showing in Presentation > Themes and on the main blog page, only text and blog post pictures were veisble. The header picture, sidebar template graphics all went missing and the sidebar ended up at the bottom of the page.
Then I used ftp to set the chmod back to 777, and it all appeared as before, but the main template was reset to WordPress Default 1.5.
The question is if 777 is unsafe, how come other settings create graphical errors? I tried 766 as well but the bugs were the same as 644.
Since that post was 8 months ago is this a version problem? If so, which CHMOD setting is best for the two folders?