Since switching to KDE4 (Kubuntu Hardy w/KDE 4.1) I've noticed that radio buttons and pushbuttons on web pages look odd. Sometimes the button is invisible, and sometimes it's only half-visible (top half, usually).

Usually this happens if I scroll off the page and back. If I run ksnapshot to take a screenshot, it fixes itself.

I'm not sure who to report this as a bug to, any thoughts? Anyone else seeing this issue?

I get the exact same thing. The only thing I know about it is that it's a bug in the Qt 4 gtk-qt-engine somewhere.

on Mandriva, this works fine.
probably a distro issue.

I'm compiling straight from the official source in Arch Linux so it's no distro issue.

so, I don't know
just rechecked on mandriva and it worked fine.

Mandravia is probably using a different method for gtk-qt4 theming. The issue is known to the author but he hasn't been very active for the last few months. (Real life happens...)
Anyway, here's to hoping that the Qt frontend for Firefox doesn't die.

I kind of wish it wouldn't try to integrate. The QT widgets look very odd and stick out like a sore thumb on most pages. I'd rather have more traditional widgets. Maybe it's just my color scheme.

The problem is not in the gtk-qt engine, but in the theme. If you use the qt4-curve theme, it will give you the problems you mentioned. I installed some Gnome themes (also in Arch) and used the clearlook theme.

BTW: OOo 3.0 with the qtcurve theme is virtually unusable since the menu bars become invisible.... Clearlook solved that too.