I've just had one of those mornings which reaffirms my decision to recommend CMSMS to clients.
I built one of my client's sites in the dim distant past before CMSMS was really what it is now. Back then I liked the look of CMSMS but wasn't sure if it'd stay alive or be abandoned or fork to death so I went for ... Mambo. Oh how I kick myself now.
Unfortunately the site required some customising of the Mambo source code which happens to prevent me from editing stuff like... the contents of the head tag... or whether everything is neatly nested in a million table tags distributed throughout the code (because obviously separating content, layout and function from each other is for wimps, real CMSes have all the code intertwined in one big knot). So it couldn't be updated and is now using a little used, and less supported fork of Mambo from before Mambo all disappeared and turned into Joomla and we don't mention Mambo any more... Great

The upshot is I am supposed to be doing some SEO and can't get the page title to print into the title tag because the object containing the page title hasn't loaded yet when the template starts printing.
It's absolutely horrific.
Children, if the nasty man asks why you don't use Mambo or Joomla, please, tell them from me, they suck so horribly it's untrue.