Horizontal lines appear after flip shapes exceed screen

[Zzzcowboyzzz]

Replicate steps:
- Draw a “BIG” star or spiral shaped object.
- Set fill-color to something rather than black, or the best is to use
gradient.
- Move the object a bit outside the screen view (not the document view
constraint)
- Try flip-vertical a few times
Some strange render of ugly horizontal lines appears on the screen but will
disappear after I unselect the object. Also please note that sometimes the
shape of the object will not be rendered right as well i.e.: two tips of a
star are connected by 1 line.

[bbyak (buliabyak)]

confirmed with svn

[jazzynico (jazzynico)]

Reproduced with Inkscape 0.45 and 0.46.
Not reproduces wih 0.47, 0.48.2 and trunk revision 10627.