Segmentation fault and var_dump()

Hello; I'm getting a segmentation fault and I don't understand what it means. Kind of new to php debugging. Background: Web server is generally error free. I have some complex php/MySQL applications installed. I'm running it under YellowDogLinux with php v4.23. I'm trying to install a CVS version of the Horde project. I'm having a problem with horde in that it doesn't save configuration values like it should. The Horde developers recommended that I do some debugging by placing a var_dump($_POST) call at a strategic place in the script. However, when I try to run the script with that call active, the web browser responds back: "Connection closed by server". Checking the apache error log shows the following: [Wed Jan 8 21:36:38 2003] [notice] child pid 5261 exit signal Segmentation fault (11) What is wrong? It only does this when the var_dump() is present; comment it out and there is no segmentation fault (but the script still doesn't work right). With it present, the seg faults every time. TIA Rob