Bug#596251: [gnome-terminal] Slow input (especially newlines) when there is a transparent background

[vi0oss]

Package: gnome-terminal
Version: 2.30.2-1
Severity: normal

--- Please enter the report below this line. ---
After updating squeeze I've noticed that gnome-terminal has become slow.

When I hold some key (especially Ctrl+C or Enter) it types characters 
slowly and consumes much CPU.

Setting from "Transparent background" to "Solid color" fixed the problem.

lxterminal shows transparent background and works normally.

--- System information. ---
Architecture: i386
Kernel: Linux 2.6.35-rc6-zen1-06923-g989d3f5

Debian Release: squeeze/sid
500 testing ftp.mgts.by
500 stable ftp.mgts.by

--- Package information. ---
Depends (Version) | Installed
=====================================-+-==============
libatk1.0-0 (>= 1.29.3) | 1.30.0-1
libc6 (>= 2.3.6-6~) | 2.11.2-2
libdbus-glib-1-2 (>= 0.78) | 0.88-2
libgconf2-4 (>= 2.27.0) | 2.28.1-3
libglib2.0-0 (>= 2.24.0) | 2.24.1-1
libgtk2.0-0 (>= 2.18.0) | 2.20.1-1
libice6 (>= 1:1.0.0) | 2:1.0.6-1
libpango1.0-0 (>= 1.14.0) | 1.28.1-1
libsm6 | 2:1.1.1-1
libvte9 (>= 1:0.24.0) | 1:0.24.3-1
libx11-6 | 2:1.3.3-3
gnome-terminal-data (>= 2.30) | 2.30.2-1
gnome-terminal-data (<< 2.31) | 2.30.2-1


Recommends (Version) | Installed
=========================-+-===========
yelp | 2.30.1+webkit-1
gvfs | 1.6.3-1


Package's Suggests field is empty.