Hi. I've noticed that the Breeze style is released under GPL-2+ license: https://quickgit.kde.org/?p=breeze.git&a=blob&h=35961704333df1ddd85e307f674a0728501c8946&hb=9920983f869b3e3654c97ea4b623c0f4e8c8fae7&f=kstyle%2Fbreeze.h
Why not LGPL? It's a library after all. BR, Alexander.