Version: (using KDE Devel)
Installed from: Compiled sources
the close button that can be put onto a tab doesn't work at all, though it is displayed properly.
Also in kde3 this button was only visible when hovering over the icon, making it possible to still see the icon of the website.
*** This bug has been marked as a duplicate of 152775 ***
Thanks Pino, seems like bugzilla wasn't smart enough to show me that the bugreport already existsed :(