Bug#668215: [iceweasel] garbage instead of random parts of texts

[Mate Miklos]

Package: iceweasel
Version: 11.0-2
Severity: normal

--- Please enter the report below this line. ---
After dist-upgrading today texts in iceweasel (not just web pages, but menu 
items and tab titles as well) randomly change to garbage, and most of the time 
back to normal. The ones that remain garbage can be 'fixed' by selecting them. 
Unselecting garbles them back sometimes, though. This happens to random parts 
with random lengths. May be a concurrency issue in text drawing?

This happens without any extensions as well. Having several tabs open 
increases the chances of occurrence.

I upgraded to Iceweasel 11 from experimental a while ago, but this started 
happening only today, so it's probably not Iceweasel's fault, but one of the 
underlying library's, but I haven't seen this problem in other gtk apps yet.

According to apt log these relevant dependencies were upgraded:
libcairo2:amd64 (1.10.2-7, 1.12.0-2)
libpango1.0-0:amd64 (1.29.4-3, 1.30.0-1)

MM

--- System information. ---
Architecture: amd64
Kernel:       Linux 3.3.1fxa

Debian Release: wheezy/sid
  500 unstable        ftp.uni-kl.de 
  500 unstable        ftp.de.debian.org 
    1 experimental    ftp.hu.debian.org 

--- Package information. ---
Depends                               (Version) | Installed
===============================================-+-
===================
libc6                                (>= 2.2.5) | 2.13-27
libgdk-pixbuf2.0-0                  (>= 2.22.0) | 2.26.0-2
libglib2.0-0                        (>= 2.16.0) | 2.32.0-3
libgtk2.0-0                           (>= 2.10) | 2.24.10-1
libnspr4-0d                       (>= 1.8.0.10) | 4.9-1
libstdc++6                           (>= 4.1.1) | 4.7.0-2
fontconfig                                      | 2.8.0-3.1
procps                                          | 1:3.3.2-3
debianutils                           (>= 1.16) | 4.3
xulrunner-11.0                      (>= 11.0-2) | 11.0-2
libasound2                          (>= 1.0.16) | 1.0.25-2
libatk1.0-0                         (>= 1.12.4) | 2.4.0-2
libbz2-1.0                                      | 1.0.6-1
libc6                                (>= 2.3.3) | 2.13-27
libcairo2                        (>= 1.10.2-2~) | 1.12.0-2
libdbus-1-3                          (>= 1.0.2) | 1.5.12-1
libdbus-glib-1-2                      (>= 0.78) | 0.98-1
libevent-2.0-5               (>= 2.0.10-stable) | 2.0.18-stable-1
libfontconfig1                       (>= 2.8.0) | 2.8.0-3.1
libfreetype6                         (>= 2.2.1) | 2.4.9-1
libgcc1                            (>= 1:4.1.1) | 1:4.7.0-2
libgdk-pixbuf2.0-0                  (>= 2.22.0) | 2.26.0-2
libglib2.0-0                        (>= 2.24.0) | 2.32.0-3
libgtk2.0-0                         (>= 2.24.0) | 2.24.10-1
libhunspell-1.3-0                               | 1.3.2-4
libjpeg8                                (>= 8c) | 8d-1
libmozjs11d                          (= 11.0-2) | 11.0-2
libnotify4                           (>= 0.7.0) | 0.7.5-1
libnspr4-0d                        (>> 4.7.1-1) | 4.9-1
libnss3-1d                          (>= 3.13.2) | 3.13.3-1
libpango1.0-0                       (>= 1.14.0) | 1.30.0-1
libpixman-1-0                       (>= 0.18.0) | 0.24.4-1
libreadline6                           (>= 6.0) | 6.2-8
libsqlite3-0                         (>= 3.7.4) | 3.7.11-2
libstartup-notification0               (>= 0.8) | 0.12-1
libstdc++6                             (>= 4.6) | 4.7.0-2
libvpx1                              (>= 1.0.0) | 1.0.0-2
libx11-6                                        | 2:1.4.4-4
libxext6                                        | 2:1.3.0-3
libxrender1                                     | 1:0.9.6-2
libxt6                                          | 1:1.1.1-2
zlib1g                             (>= 1:1.1.4) | 1:1.2.6.dfsg-2


Package's Recommends field is empty.

Suggests                (Version) | Installed
=================================-+-===========
ttf-lyx                           | 2.0.3-2
 OR latex-xft-fonts               | 
xfonts-mathml                     | 4
ttf-mathematica4.1                | 
mozplugger                        | 
libgssapi-krb5-2                  | 1.10+dfsg~beta1-2
 OR libkrb53                      | 
libgnomeui-0                      | 2.24.5-2
libcanberra0                      | 0.28-4