application/x-httpd-php error - Joomla! Forum - community, help and support

i have client has site hosted godaddy. 
the site working fine until 2 days ago.

site http://www.asktheagent.info

now when click on of links on menu error - see image below:




i called godaddy support see if on server had changed , tech said nothing had , not me with.

google searches indicate might can change in .htaccess file? or mime type?

has experienced this?  cause of sudden start happening? swear didn't edit .htaccess file recently.

thank  assistance!

lynette

+++++++++++++++++++++++++++++++++++++++++++++++++

my .htaccess file below:

##
# @version $id: htaccess.txt 2368 2006-02-14 17:40:02z stingrey $
# @package joomla
# @copyright copyright (c) 2005 open source matters. rights reserved.
# @license http://www.gnu.org/copyleft/gpl.html gnu/gpl
# joomla! free software
#######################################################
#  read if choose use file
#
# line below section: 'options followsymlinks' may cause problems
# server configurations.  required use of mod_rewrite, may already
# set server administrator in way dissallows changing in
# .htaccess file.  if using causes server error out, comment out (add # to
# beginning of line), reload site in browser , test sef url's.  if work,
# has been set server administrator , not need set here.
#
# use 1 of 2 sef sections follow.  lines can uncommented
# (and used) have 1 #.  lines 2 #'s should not uncommented
# in section don't use, lines should start #
#
# standard sef, use standard sef section.  can comment out
# of rewritecond lines , reduce server's load if you
# don't have directories in root named 'component' or 'content'
#
# if using 3rd party sef or core sef solution
# uncomment of lines in '3rd party or core sef' section
#
##########################################################  solving problems component url's don't work #####
# special note smf users when smf integrated , bridged
# or situation component's url's aren't working
#
# in both 'standard sef', , '3rd party or core sef' sections line:
# rewritecond %{request_uri} ^(/component/option,com) [nc,or] ##optional - see notes##
# may need uncommented.  if running joomla! from
# subdirectory name of subdirectory need inserted this
# line.  example, if joomla! in subdirectory called '/test/',
# change this:
# rewritecond %{request_uri} ^(/component/option,com) [nc,or] ##optional - see notes##
# this:
# rewritecond %{request_uri} ^(/test/component/option,com) [nc,or] ##optional - see notes##
#
#######################################################  can commented out if causes errors, see notes above.
#options followsymlinks#
#  mod_rewrite in userewriteengine on#  uncomment following line if webserver's url
#  not directly related physical file paths.
#  update joomla! directory (just / root)# rewritebase /########## begin standard sef section
## (rewritecond) lines in section required if actually
## have directories named 'content' or 'component' on server
## if not have directories these names, comment them out.
#
#rewritecond %{request_filename} !-f
#rewritecond %{request_filename} !-d
#rewritecond %{request_uri} ^(/component/option,com) [nc,or] ##optional - see notes##
#rewritecond %{request_uri} (/|\.htm|\.php|\.html|/[^.]*)$  [nc]
#rewriterule ^(content/|component/) index.php
#
########## end standard sef section########## begin 3rd party or core sef section
#
#rewritecond %{request_uri} ^(/component/option,com) [nc,or] ##optional - see notes##
rewritecond %{request_uri} (/|\.htm|\.php|\.html|/[^.]*)$  [nc]
rewritecond %{request_filename} !-f
rewritecond %{request_filename} !-d
rewriterule (.*) index.php
#
########## end 3rd party or core sef section

addtype application/x-httpd-php .html .htm

i need add have seo enabled , if disable it, site works ok.
it appear related .htaccess seo uses. 

i want use seo site in pinpointing problem in .htaccess can still use seo great.

thanks!
lynette