From time to time some of my applications on Mac OSX Tiger tend to loose some functionality. The most frequent bug is that I cannot minimize a window to the dock. It’s not only that the window does not response. The orange minimize button at the upper left of the window is ghosted…
For your understanding: This is what it should look like.

and this is what it look like:

Uhm… weird!
It’s not a Bug, it’s a Feature!
what feature? To ensure I’ll buy the next version?
I had the same problem. don’t know for what reason but after quit and restart of the programm that won’t minimize – the bug dissapeared