Bug#353268: Very slow scrolling with background image

[roland65 at free.fr]

Package: gnome-terminal

Version : 2.12.0-2

Scrolling is *very* slow when I use a background image (with or without the
"Background image scolls" option, with or without the "Scroll on output"
option).

Example : ls -la in /usr/bin (1628 lines)

- without background image :
time ls -la
0.036u 0.032s 0:01.63 3.6% (elapsed time : 1.63 seconds)

- with background image :
0.016u 0.036s 0:09.55 0.4% (elapsed time : 9.55 seconds, 6 times slower)

- with transparent background :
0.020u 0.012s 0:01.79 1.6% (elapsed time : 1.79 seconds)

To compare :
time ls -la in konsole with the same background image
0.024u 0.024s 0:00.29 13.7% (elapsed time is less than 1 second)

This problem is not transient, it is *always* the case...
The same problem arose with gnome-terminal 2.10
Hope this helps!
RB