Release-stopping bug found: undo

[Tuomas Lukka <lukka@xxxxxxxxxx>]

Ok, there is one show-stopper in ver_0_3 branch (as well as trunk, of
course): undo does not work properly at all.

I don't have a chance to take a look now to see what is happening - I
already fixed it a small bit but it now only works once. Which is not
acceptable.

I'd say put out 0.3.0 the moment that bug is fixed and the fix tested and
then worry about 0.3.1 when the bug reports come in ;)

	Tuomas