[cairo] Painting regression in 1.4.x

[Damon Chaplin]

Hi,

In the GooCanvas demo if I set the zoom to 5.0 and scroll around I am
getting painting artifacts on the image items (e.g. the big pixmap under
"Images").

This problem occurs in 1.4.0/1.4.2 but not in 1.2.4. (The GTK+ version
is the same.)

Should I add this to bugzilla? (The number of crashing bugs in bugzilla
is a bit worrying, by the way. Maybe that should be the focus for the
next release.)

Damon