When I install PHP 4.3.10 with Apache 2.0 with a tool called YUM that installs rpms for Fedora Core 3 I get the following: Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsafe. You need to recompile PHP. Pre-configuration failed I¹m not sure why Fedora would distribute a package that wouldn¹t work with other packages, however what is this ?threadsafe¹ feature and how can I specifically enable it so I can get php installed? Thanks! T