Thought I'd share this with the community.
Yesterday raised a ticket after having googled to see what probable / possible issues could be.
Guys, I've just noticed on a couple of accounts that I run MODX Revolution on that I'm unable to create and save both chunks and snippets where in the past has not been a problem?
I have Googled this and would seem that it is an issue with mod_security please see this page
http://forums.modx.com/index.php/topic,53447.0.html
for more information.
and then after a few other back & forth sent this
Hey guys look at this please.
http://forums.modx.com/thread/?thread=84292
it's is seemingly a site5 issue, in which they have recently made changes
submit a ticket in backstage
to change mod_security to Setting filtering to allow MODx manager main source file to execute over security settings
Open your .htaccess file(s) and add the following to it.
SecFilterEngine On
SecFilterSelective "REQUEST_URI" "/manager/index.php" "allow,nolog"
from
http://wiki.modxcms.com/index.php/What_is_mod_security_and_how_does_it_affect_me
Many thanks for your attention to this
and then the answer solution from them
I tried to disable mod_security for stylealtitude.com completely but it had no effect. Then I went ahead and switched your MODX to PHP 5.2 by adding this:
AddHandler application/x-httpd-php52 .php into your main. htaccess.
After this had been made I was able to duplicate "BalmeVideo" into "BalmeVideo2" in accordance with your original instruction.
This leads me to idea your current MODX is not really friendly with PHP 5.3 which was set for your website by default. Please check if your website is working well with PHP 5.2 and let us know if something is still wrong.
Thanks,
Alex M.
Technical Support Specialist, Site5.com