My new central configuration option does not seem to have taken effect.

If you have used the Domino documentation to copy a central configuration option which you subsequently pasted in to your central configuration and restarted services only to find the option does not appear to have taken effect, double check that there are no errant spaces in the configuration option that you copied from the documentation.

At the moment a space has been added in the option strings in the documentation to control the line break formatting.  A copy button next to the option in the documentation should be used to copy these options without the space included.