[todd]
...
> >>> .21
> 0.20999999999999999
> >>>
>
> Now, I realize that this is really small errors.. Does anybody have an
> explanation why Python picks up or loses these?
Many people do, and a few of them are even correct <wink>. If you
start here, you can stop here too:
http://docs.python.org/tut/node15.html