This problem (406 error) start only when I set the plugin setting "display option".
Any plugin give me this problem, but sometime when use my site of exemple anypage give 406 enter (XD ex login page).
For Apache configuration i have see in my host service:
Apache version 2.2.22
The unique section for apache is: Apache handlers
Apache handlers control how the Apache web server software manages certain file types and extensions for your site. Apache comes configured to handle CGI scripts and server-parsed files. You can configure Apache to handle a new file type with an existing handler by manually adding the handler and extension below. For example, to have the server treat files with the extension .example as CGI files, you would type "cgi-script" under Handler and ".example" under Extension(s)..
and there are 2 selection:
System Apache Handlers
Handler ----------- Extension(s)
cgi-script : ----------- .cgi .pl .plx .ppl .perl
server-parsed ----------- .shtml
Sorry but I not understand this configuration for apache.
for some time I have a problem with ghost cache,but dont know if there are a connection