Hmm, unfortunately there have been some issues with translation plugins (including qTranslate).
Rather than troubleshoot on the live site, would it be possible instead to set up a new WordPress installation – you could even do this from a subdirectory in the same environment – and initially install just our plugins and nothing else. See if everything works as expected.
If it does, the next step is to add each plugin, including qTranslate (and also your theme) and test each time you add something to see if the problem has returned. This is a great way to pin down problems without impacting on a live site.
Let us know how you get on!