If you are getting debugging messages on your Nokia device after installing Traveler 852 then you will want to download a newer version of traveler 852 which was released on the 19th September.
This is not an interim fix or a hot fix but rather a fix that has been sneaked into the new multilingual installer.
It does not appear on fix central, I happened to just come across it in this notes forum thread. Actually Traveler 8.5.2 is not recognised by fix central at all.
The debugging messages appear as black text in a blue box.