I've been looking into this issue but from the point of view of FlashFXP and the sites I have available for testing, I have been unable to reproduce the problem or determine a cause for it.
You can download 3.4 from our website, either from the main download link or via the customer portal.
Normally I don't reply to posts until I have an answer and at the moment this issue has me stumped.
If you want to contact me directly via the customer support (bug report)
http://www.inicom.net/pages/en.contact.php
we can try and work something out, I'm not quite sure if this is something that can be debugged remotely.
I would really like to get to the bottom of this issue but due to the nature of the issue it's very difficult.