A temporary solution: 
Add some height into mysite/profile/templates/profile/widget.html

Attached is a small patch that makes height 280px - possibly breaking things. 

Someone really should make this easily changed through some user input to set
both width and height in mysite/account/templates/account/widget.html

I did look into this briefly, what I found is reported at issue48.

This is an important user interface bug that we should fix.

For whoever's reading this, if you want to fix it, the first thing to do is to
check out what these other widgets are doing right! If necessary, you might want
to simulate embedding the widget in a few HTML pages on your own computer, just
to test out what it looks like.

issue48 is related to this, too, I imagine.

The FOSS contribution widget seems to have no height properties. If I embed it
into a netvibes.com HTML container, it is displayed with a height of maybe 30
pixels, so not even the headline is completely visible. I use widgets from lots
of other pages like ohloh.net and they all work fine on netvibes.com, so I
assume the problem is with the openhatch widget.