[ripkens]

It is with self compiled php 4.3.9 (http://www.mobile2day.de/info.php) running as lsphp (just replaced original one)

The error is 404 because server does not respond to request in any way, so its the same error Firefox gets when not finding a server
"Document contains no data"

The error occurs sometimes after 5 seconds, sometimes after 30, dont know what it is.

It seems that the server behaves like that only if it is under load, on a test IP we "sometimes" could upload a 7M File, on the produktion IP it doesnt even except 1400K