Downloads not working properly

www.the-rock.org.uk/sermons.html
SS 3.4.3
Joomla 1.5.25
PHP 5.2.17

My 'download' button on the individual sermon page is working - but not correctly.

For some reason, all of the latest 5 sermons, actually download the 6th sermon 'Twelve Transformational Tales (Part 1)'.

All caches have been cleared (in Joomla and in Firefox). I have also tried it in different browsers and get teh same problem.

Does anyone have any ideas on how to fix this?

(I've also just posted a message about iTunes not picking up the last few podcasts - don't know whether the issues are related or not).

Actually not only the last 5, all of them point to the same file.

Do you have caches activated in Joomla or the server? Maybe also check for a special system plugin which could cause such issues.

The SermonSpeaker code itself shouldn't be able to do such things.