Thread:Extension talk:RSS/ sub ParserFunction doesn't work anymore

I used this snippet to trim/strip long title segments in the RSSPost-Template: }}

But after updating from version 1.9 to 2.16 20120424 it doesn't work anymore. The parser function is not applied to the title. I already switched to the new template name etc. Therefore I can't use the latest version in my production environemnt, because the long title will destroy my layout respectively my main page.