403 Error saving general settings in CB Subs 2.0.2 & 3.0

[29/Dec/2012:23:20:05 +0000] "POST /administrator/index.php HTTP/1.1" 403 380 "http://sitename/administrator/index.php?option=com_comprofiler&task=editPlugin&cid=514&action=showparams&cbprevstate=b3B0aW9uPWNvbV9jb21wcm9maWxlciZ0YXNrPWVkaXRQbHVnaW4mcGx1Z2luaWQ9NTE0"

[30/Dec/2012:09:22:10 +0000] "POST /administrator/index.php HTTP/1.1" 403 380 "http://sitename/administrator/index.php?option=com_comprofiler&task=editPlugin&cid=514&action=showparams&cbprevstate=b3B0aW9uPWNvbV9jb21wcm9maWxlciZ0YXNrPWVkaXRQbHVnaW4mcGx1Z2luaWQ9NTE0#savePlugin"

I'm seeing the above 403 error when I try to change any settings in CBSubs - General
This is occurring on 2.0.2 site & 3.0
2.0.2 site is J2.5.8 and the 3.0 sites are J1.5 & 2.5.8


I've seen these two posts which indicate it might be mod_security causing the issue...
www.joomlapolis.com/forum/256-cbsubs-support/211791-solved-issues-with-development-environment-installation#212481
www.joomlapolis.com/forum/151-potential-bug-112/151583-solved-upgraded-but-now-get-403-if-edit-cb-subs-plugins?limit=6&start=6


Checked with my host but they can't see any errors in mod_security.

I still think it's a server issue: The apache error log entry (there IS one when server returns 403) could help.

Maybe suhoshin with too low limit on number of request fields on a POST request ?

As suspected it was mod_security - the host has fixed it for J1.5 & are looking at fixing J2.5 now