Update:
On KDE 4.7.2 Kubuntu 11.10, I do not see this issue anymore. SystemSettings->AppAppearance->GTK+Appearance->Widget style = oxygen-gtk works fine.
Update:
On KDE 4.7.2 Kubuntu 11.10, I do not see this issue anymore. >AppAppearance- >GTK+Appearance ->Widget style = oxygen-gtk
SystemSettings-
works fine.