The tool is awesome - this is a traditional way to to start any complaint or feedback for freemind, and the only appropriate one!
But here is something that terribly frustrates me regularly in Freemind 0.9.0: when I try to insert into a freemind node some formatted text, usually copy-pasted from browser, the PC often freezes. it can last couple of seconds or even some 5 minutes - as it happened last time when I tried to paste 100 lines of chat history from gmail.com. The CPU was about 99% for several minutes. this is something that happens often, but not always; therefore I tend to copy things through notepad, but sometimes i forget, and get a freezing screen.
I wonder what is the reason of that, and I hope it will be fixed in the forthcoming versions.