Just as a note, since Air is now the default theme for Plasma (and what’s worse, it is even called “default” instead of “air”), you’ll see that the Lancelot themes in 4.3 RC are screwed up. Unfortunately, I wasn’t able to fix this before 4.3 RC tagging today (I was too late to discover the issue in the first place).

It is fixed both in the trunk and in the 4.3 branch, but, as I said, not on the time. So, just that you know, it is already fixed and all will be well in final 4.3.