Maybe I should reduce some of my earlier entries. I've still got my entire work history on my CV. I worked on a specific CMS from 2004-2008, and I still get asked for gigs related to that CMS (even if the version I worked on is nothing like the current version). I worked on a PHP problem for 3 days once, and put it in mostly as an example that I can quickly adapt to new languages, but some people actually want to hire me for a pure PHP project.
The "this is everything that I've worked on, if this interests you, contact me" is different than a "this is the information relevant to the job that I am applying for."
If you've got a CV hosted somewhere with CMS and you still do CMS stuff and want to get hired to do CMS stuff... leave it on there. If you don't want to do CMS stuff, take it off.
If you are applying to a job that isn't doing CMS stuff, on your resume that you're sending to them don't have more than a single bullet point for that old job about CMS duties.
