In order to troubleshoot this issue I have enabled the error_logs on your server. Below is a copy of the error message that is logged when trying to access flytyingbug.com. It seems one of your php files is attempting to modify a php limit. However, it is trying to increase the limit beyond the allowed memory limit. You will need to review your code/application in order to resolve this issue.
[Tue Dec 07 03:07:58 2010] [error] [client 72.10.xx.xx] ALERT - script tried to increase memory_limit to 134217728 bytes which is above the allowed value (attacker '72.10.xx.xx', file '/nfs/c07/h02/mnt/110115/domains/flytyingbug.com/html/library/XenForo/Application.php', line 157)
[Tue Dec 07 03:07:58 2010] [error] [client 72.10.xx.xx] ALERT - script tried to increase memory_limit to 134217728 bytes which is above the allowed value (attacker '72.10.xx.xx', file '/nfs/c07/h02/mnt/110115/domains/flytyingbug.com/html/library/XenForo/Application.php', line 157)
[Tue Dec 07 03:07:58 2010] [error] [client 72.10.xx.xx] ALERT - script tried to increase memory_limit to 134217728 bytes which is above the allowed value (attacker '72.10.xx.xx', file '/nfs/c07/h02/mnt/110115/domains/flytyingbug.com/html/library/XenForo/Application.php', line 157)
[Tue Dec 07 03:07:59 2010] [error] [client 72.10.xx.xx] ALERT - script tried to increase memory_limit to 134217728 bytes which is above the allowed value (attacker '72.10.xx.xx', file '/nfs/c07/h02/mnt/110115/domains/flytyingbug.com/html/library/XenForo/Application.php', line 157)