Version: 1.7.1 (using KDE 3.3.1, Yoper) Compiler: gcc version 3.4.1 OS: Linux (i686) release 2.6.8.1-10 with the nuvola icons in kmail, the top of the "show detailed progress window" icon in the status bar is cut off with plastik. ive tried it with both nuvola and crystal with the same results.
Only way I could reproduce this was by enabling 'Double-sized pixels' for 'Small Icons' in KControl->Appearance&Themes->Icons->Advanced. But yes, it's valid.
Couldn't see a problem using Plastik Style, Oxygen Icons and "Double-sized pixels" enabled. Tested with kmail from KDE4.1+ svn trunk (r860647).
double sized pixel icons are now gone; the a11y people say they were obsoleted by things like monochrom icons and the kwin zoom tools.