I've got a client who has been trying to upload huge audio files via FTP and then syncing the files in the file manager. The client has found accessing the file manager results in a server 500 error. The web hosts said the server logs reported that 'Script timed out before returning headers: admin.php'. And so the 'software'(ie ExpressionEngine) was the cause.
I'm not convinced, but wondered if there is any setting in EE that can be altered to prevent the timeout.
On a separate issue, the server is located in California, and the client is in the UK. Would that be a cause?