For people who would like not to upgrade you can try this. This is something i did to fix it and it worked for me:
I had to manually edit the conf file adjusting the number of iControlPortal.cgi processes.
Edit /etc/httpd/conf/httpd.conf altering this line:
FastCgiServer /usr/local/www/iControl/iControlPortal.cgi -processes 1 -socket iControlPortal -idle-timeout 300
to read as:
FastCgiServer /usr/local/www/iControl/iControlPortal.cgi -processes 2 -socket iControlPortal -idle-timeout 300
Save the file and restart Apache by issuing a "bigstart restart httpd".