fonts in Qt4 look ugly because it uses Nimbus Sans L instead of Deja Vu Sans for Sans-Serif
But Qt4 seems to completely ignore these settings and use "Nimbus Sans L" as the Sans Serif font, which looks really ugly(at least with my monitor), changing the default font from "Sans Serif" to "DejaVu Sans" in qtconfig-qt4 workaround the problem, the change must also be done in KDE4 Appearance kcm module.
Attached is a screenshot of qtconfig-qt3(left) and qtconfig-qt4(right) for comparison, they both use the default font(Sans Serif).
|Changed in qt4-x11 (Ubuntu):|
|importance:||Undecided → Low|