I've set the system setting of "Regional & Language" -> "Country/Region & Language" -> "Other" -> "Paper format" to "US Letter", my /etc/papersize file contains the text "letter", and the program "paperconf" outputs the text "letter". Despite all of this, though, when I open the "Print..." dialog in a KDE program, choose "Print to File (PDF)" or "Print to File (Postscript)", and open the "Properties" dialog, the "Page size" will be set to "A4". I can set it to "Letter", then press OK, then press Print, and it will generate the output with Letter page size; however, if I then open the "Print..." dialog again, the page size will have reverted to A4.

(I'm not sure what happens when using a real printer.)

I'm using KDE 4.4.0 and Qt 4.6.2, on Linux.

Should I report this as a bug? If so, is it a Qt bug or a KDE bug?

This is a bug in Qt & KDE interactions with each other, and should be covered by the Qt Platform Plugin. Please file a bug report at bugs.kde.org.

https://bugs.kde.org/show_bug.cgi?id=229261