When uploading large images, I got a "Document contains no data" error when using Netscape and an error page when using Explorer. My server setup is RH Linux 9, Apache 2 and PHP 4.3.
I found out that the following entry in the httpd.conf file was missing:
LimitRequestBody 524288 (max size in bytes)
When this had been added, everything worked smoothly.
- Oli Jon, Iceland