Ah OK. Minor problem. :-(
Why can't they make Qt/Win32 GPL:ed as well with the exception of the drawing primitives that have to become LGPL:ed.
They released Qt/X11 under the GPL, since the GPL according to their interpretation will protect them from "free commercial use".
Why not release Qt/Win32 under the GPL as well?
Not sure, might be worth asking, but I expect it's because they believe they would lose a lot of customers writing internal corporate software for Win32 - if the software is for internal use only, you could just make it GPLd and not pay TT anything. Restricting the free version to a display protocol not well supported on Win32 allows them to make more money.