It transpires that there is a problem with the recording converter that turns standard Collaborate recordings into mp4 videos.
Description – The recording will appear to have converted but when trying to play it back the video will at best be only a few seconds long.
The issues is listed as known here: http://support.blackboardcollaborate.com/ics/support/default.asp?deptID=8336&task=knowledge&questionID=2733
Although Collaborate assure us that they are working on a fix for this problem there is no ETA on when this will be available.
They have suggested a work around of using the Collaborate Publish tool but we are currently experiencing problems with this also.
If you require a recording converted to a mp4 video please get in touch with firstname.lastname@example.org and we will see what we can do.
This should not affect any converted recordings that have already been confirmed as working. Unfortunately the only way to tell if a recording has converted properly is to attempt to watch it.