[Zope-dev] zope /tmp file usage

Hi, I am wondering what code in Zope 2.7.5-final potentially may use /tmp directory for temprorary files. I am using zope over webdav and sometimes webdav tries to create a tmp file, of some sort and some parts of the system lock up. There are xml parsers,mime decoders all of which do have binary code bits, so I asking for expert advice, if someone knows of what circuimstances zope would use /tmp directory to create a file... your help will be greatly appreciated. Pavel