File upload problems with Apache and Linux

I have a server running SuSE Linux Pro V7.0 (with security patches) , Apache 1.3x (not sure which version or how to find out) , and PHP (again not sure which version or how to find out). I am trying to get file uploads working to the server, I currently have a page which is written in PHP to dynamically create a form complete with file input field. Form is set to "multipart/form-data" encoding type and is displayed OK in the browser. The form has a valid php file included in the action part of the form tag. I have set the upload_tmp_dir variable in the php3.ini file to a valid pathname with the relevant permissions set. If I try to submit a file for upload using the form using Netscape I get "Document contains no data". If I do the same in IE5.0 it just waits forever. Looking at the apache server error_log file I appear to be getting a "Segmentation Fault (11)" each time I try and Post the contents of the form to the server. Has anyone else had this problem? Is there something I need to switch on in either apache or PHP to support file upload? I have tried looking at the file upload tutorial in the PHP manual and it is the same as I am trying to implement, seems like my system isn't happy somewhere...! Any help would be appreciated. Thanks Martin