Ahmad Fahmy wrote:
Hello,
All forms on my site produce an "internal server error 500" including the login, search and contact us forms. If I delete and restore the database or upgrade my drupal installation the error is fixed , but only for a short while and then suddenly without doing anything, the error reappears!!!!!!!!!!!
This could mean you've used all of the available memory within the server after time has elapsed. If you reboot the server instance, everything, not just Drupal, does it go away for a while?