This is my first bug filed, so sorry if it's not done right. But it's a very simple problem. The 'kde-base/kworldwatch' package installs the program 'kworldclock'. I can't think of any reason why the name of the package should be different than the name of the thing it's installing. At least in a simple case like this. Especially when the ebuild containing themes for it is "correctly" named as 'kde-base/kdeartwork-kworldclock'. This should be a simple fix, right?
Well, it doesn't really harm. Something to change if anyone has the time...
bugzie.
This bugie was fixed long time ago :]