placing a cross over quarterly produces unaligned output

Can you provide an example blazon that demonstrates the problem?
Quarterly argent and gules, a cross botonny counterchanged.

What is the expected output? What do you see instead?
a cross botonny in the center. It is off-center now.

What version of drawshield are you using?
2.2a4

What browser and version where you using to view the shield? Does the
problem also occur on other browsers?
Firefox, yes

Please provide any additional information below.
Any cross placed over a quarterly should share the center point, and so should 
certain other charges which have a well-defined center. Exempli gratia, 
"Quarterly argent and gules, an annulet counterchanged." "Quarterly argent and 
gules, a lozenge counterchanged." "Baton" works fine, "bend" as well, although 
I am not sure whether in this case, it should be placed over the entire 
quarterly pattern (as opposed to four bends, one in each quarter.) "bend 
sinister" produces no bend and no error message. "Bezant" is not centered, 
neither is "billet," "cinquefoil," "cross crosslets," "cross crosslets fitchy," 
"cross flory," "Maltese cross," "cross patty," "cross patonce," "patriarchal 
cross" (in this case, the alignment should probably be the midline of the lower 
arm,) "cross potent," "cross pointed," "fountain," "fusil," "fylfot," "hurt," 
"rustre," "triangle."

Original issue reported on code.google.com by pku...@gmail.com on 13 Jul 2010 at 9:57

PQYPLZXHGF / drawshield

placing a cross over quarterly produces unaligned output #189