[plt-scheme] buggy PLT-Scheme?

I was writing code in the PLT-Scheme IDE when all of a sudden the
application crashed. I let Windows send a bug report, so I hope the
developers will receive it.

Also, PLT-Scheme often "hangs" for many seconds doing a lot of
activity on the harddisk. It occurs very spontaneously - like for
example while I'm typing code (which shouldn't be a harddrive-
intensive task)

Does other have similar experiences?

Im running version 4.1.4 Danish on Windows XP sp3