Dear maintainer, in addition to what already reported, I can add that the problem is limited to libmateweather1t64:amd64 package since changing its control file of the previous version (1.26.3-3.1+b2) to allow also latest libmateweather-common version (1.26.3-3.2 ) (i.e. libmateweather-common (>= 1.26.3-3.1) ) works correctly.
$ dpkg -l | grep libmateweather ii libmateweather-common 1.26.3-3.2 all MateWeather shared library (common files) hi libmateweather1t64:amd64 1.26.3-3.1+b2 amd64 MateWeather shared library By looking at /var/log/syslog I've found this error lines that suggest the problem is related to a double-free: 2025-04-16T10:24:17.858122+02:00 debian dbus-daemon[3044]: [session uid=1000 pid=3044 pidfd=5] Activating service name='org.mate.panel.applet.ClockAppletFactory' requested by ':1.48' (uid=1000 pid=3352 > 2025-04-16T10:24:17.872848+02:00 debian dbus-daemon[3044]: [session uid=1000 pid=3044 pidfd=5] Successfully activated service 'org.mate.panel.applet.ClockAppletFactory' 2025-04-16T10:24:17.893957+02:00 debian org.mate.panel.applet.ClockAppletFactory[3422]: free(): double free detected in tcache 2 2025-04-16T10:24:17.924003+02:00 debian wnck-applet[3363]: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner WnckButton) 2025-04-16T10:24:17.925643+02:00 debian wnck-applet[3363]: Negative content width -1 (allocation 1, extents 1x1) while allocating gadget (node button, owner WnckButton) Regards, Sergio