GtkLabel wrapping (or lack thereof)

[Vadim Berezniker <vadim berezniker com>]

Even after enabling wrapping on a label, it only wraps once and to a 
boundary I don't even understand. (Some labels wrap at one width, and 
some at another width.)
Also the label does not rewrap when the parent container is resized.

I also tried modifying the underlying PangoLayout with no avail.