I check my error logs and I get this.
[Tue Jan 21 19:37:40 2014] [error] [client xx.xx.xx.xx] File does not exist: /home/xxx/public_html/500.shtml, referer: http://xxx.co.uk/xxx/installation/index.php?view=finalise
[Tue Jan 21 19:37:40 2014] [error] [client xx.xx.xx.xx] ] [notice] EACCELERATOR(4482): PHP crashed on opline 47 of preg_replace_callback() at /home/xxx/public_html/xxx/libraries/joomla/filter/input.php:713, referer: http://xxx.co.uk/xxx/installation/index.php?view=finalise
[Tue Jan 21 19:36:10 2014] [error] [client xx.xx.xx.xx] File does not exist: /home/xxx/public_html/404.shtml
[Tue Jan 21 19:36:10 2014] [error] [client xx.xx.xx.xx] File does not exist: /home/xxx/public_html/favicon.ico
[Tue Jan 21 19:22:31 2014] [error] [client xx.xx.xx.xx] File does not exist: /home/xxx/public_html/404.shtml, referer: http://xxx.co.uk/xxx/installation/index.php
[Tue Jan 21 19:22:31 2014] [error] [client xx.xx.xx.xx] File does not exist: /home/xxx/public_html/xxx/media/jui/js/jquery-1.10.2.min.map, referer: http://xxx.co.uk/xxx/installation/index.php
[Tue Jan 21 19:22:04 2014] [error] [client xx.xx.xx.xx] File does not exist: /home/xxx/public_html/500.shtml, referer: http://xxx.co.uk/xxx/installation/index.php
[Tue Jan 21 19:22:04 2014] [error] [client xx.xx.xx.xx] ] [notice] EACCELERATOR(3833): PHP crashed on opline 47 of preg_replace_callback() at /home/xxx/public_html/xxx/libraries/joomla/filter/input.php:713, referer: http://xxx.co.uk/xxx/installation/index.php
Do you have any ideas as to what could cause this? I have never had this problem before on this server, it seems strange, but I do not normally use Joomla 3.2.1.
I've followed your other instructions, there is definitely enough memory, there are no .htaccess files as I was going to set them up on the live server not local, permissions should be correct