Created attachment 13719 [details]
Screenshot showing bug

Look at the end of "This account is not valid", the 'd' is not fully
drawn. (Tested with default theme too)

I guess we should request 

        2 max (hl, hr) + logical width

where hl and hr are the amounts the ink rectangle hang out to the left
and right compared to the logical rectangle. In size_allocate() the
label should only use the logical width when centering.

There are potentially many instances of this problem.

In general, the alignment of lines in GtkLabel should not
depend on the particular text in the label, so you'd 
have to have some way of getting a fixed amount of padding
for the particular PangoFontDescription (Markup in the
label that changes the font makes things significantly worse,
but possibly can be ignored.)


*** This bug has been marked as a duplicate of 81874 ***