+=item
+
+B<3.> collectd handles I<SIGCHLD>. This means that Python won't be able to
+determine the return code of spawned processes with system(), popen() and
+subprocess. This will result in Python not using external programs like less
+to display help texts. You can override this behavior with the B<PAGER>
+environment variable, e.g. I<export PAGER=less> before starting collectd.
+Depending on your version of Python this might or might not result in an
+B<OSError> exception which can be ignored.
+
+If you really need to spawn new processes from Python you can register an init
+callback and reset the action for SIGCHLD to the default behavior. Please note
+that this I<will> break the exec plugin. Do not even load the exec plugin if
+you intend to do this!
+
+There is an example script located in B<contrib/python/getsigchld.py> to do
+this. If you import this from I<collectd.conf> SIGCHLD will be handled
+normally and spawning processes from Python will work as intended.
+