+1 for the problems Tycho reported: - black desktop background with visible panels and icons - some buttons appear pure white, without any label (for an example, buttons in Chromium notification bar)
Problem appeared after a package upgrade recently which upgraded mate-settings-daemon (among others): mate-settings-daemon: 1.16.0-2 to 1.16.2-1 mate-settings-daemon-common: 1.16.0-2 to 1.16.2-1 Running the same system as OP: -- System Information: Debian Release: 9.0 APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Debian Stretch is officially frozen since 5.2.2017: https://lists.debian.org/debian-devel-announce/2017/02/msg00001.html mate-settings-daemon 1.16.2-1 packages are in the Stretch repo since 28.4.2017. Current package versions in BOTH Stretch and Sid (27.5.2017.): mate-desktop: 1.16.1-1 caja: 1.16.2-2 According to upstream, problem is solved in mate-desktop 1.16.2 and caja 1.16.3. @Dear Maintainer, please build new versions of mentioned packages and deploy them to unstable, so they can reach the Debian 9 release on 17.6.2017. Or, alternatively rollback older versions? Thanks! Comment on the severity: Taking into consideration Stretch release date and user experience perspective, I would call this bug critical, since having a static black background with glitched buttons in some software is not what a user would expect from a desktop environment in a stable release. Reference from the upstream change log: +mate-desktop 1.16.2 + + * Background: fix crossfade issues with recent GTK+3 versions + * Background: fix more graphics issues to allow Caja to use background for directory windows in GTK+3 build + * Background: fix memleaks and other misc issues -- Ivan