Bug#118363: Seems to be a KDE bug
It looks like this might be a bug in KDE itself, as the behaviour
appears in the file chooser rather than in any part of noatun proper.
I also see the same behaviour with ark, the archiver.
I've opened a case against kdebase...
Colm Buckley : Systems Architect @ NewWorld Commerce
Business: +353 1 4334334 / firstname.lastname@example.org / http://www.nwcgroup.com/
Personal: +353 87 2469146 / email@example.com / http://www.tuatha.org/~colm/
If you hear an onion ring please answer it.