I just discovered this thread, and I have to say that I kind of see Kovid's point. He wants to make sure people have (at the least) legally acknowledged that they understand they're not allowed to re-distribute calibre or any modifications of it without giving him (and the other developers) credit.
In another thread, I'd been talking with Kovid about making a new installer for calibre, since I personally don't like the .msi system, I prefer NSIS. If I had, the GPL would have been included, although I probably wouldn't have made it an active checkbox unless he'd asked me to. Personally, I figure that just displaying it and labeling the button "Accept" is sufficient, but Kovid wants to make absolutely certain that people acknowledge that they've read and understand the GPL. Makes sense, since he wants to protect all the work everyone (especially himself) has put into the program.
