Chipmunk sound problem in Training&Certification movies

In recent times we've had increasing reports of a sound problem when playing back the Training & Certification movies.

After some investigation, according to Techsmith (producers of Camtasia - the SW used to record and produce the movies), this is caused by a problem in the most recent version of Flash!

They've posted an article on this:

To fix content already produced with Camtasia, an utility tool has been released. We're going to fix and re-upload all the movies. In the meantime, you can use the utility yourself.

Thanks and sorry for the trouble!