Markzware is the developer of FlightCheck, the patented preflight solution to check Adobe InDesign CS4 and many other file types. Markzware is very familiar with preflighting features. Here is a review of preflighting features in Adobe InDesign CS4, written by a print production industry member:

The feature that most impresses me in the latest rendition of InDesign is the Preflight.
I know, I know: InDesign has always had a great preflight function; however, the gang at
Adobe has taken it up a notch or two or three thousand. … Read more

We recommend FlightCheck to thoroughly preflight Adobe InDesign CS4 files and more for print quality of document output. Markzware’s pre press software is available via the FlightCheck page.

Adobe InDesign CS4 Preflighting Features Review