Dear maintainer, I have the problem also on a Mate Desktop. I send you a debug.txt
Thanks, Bernd
(package-update-indicator:1445): Gdk-CRITICAL **: 13:55:54.270: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.081: property "update-command" set to "/usr/bin/gpk-update-viewer" (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.117: indicator icon: system-software-update, notification title: "", notification body: "" (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.119: backend: aptcc (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.119: roles: cancel;depends-on;get-details;get-files;get-packages;get-repo-list;required-by;get-update-detail;get-updates;install-files;install-packages;install-signature;refresh-cache;remove-packages;repo-enable;resolve;search-details;search-file;search-group;search-name;update-packages;what-provides;download-packages;get-old-transactions;repair-system;get-details-local;get-files-local;repo-remove (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.119: network-state: online (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.120: property "refresh-interval" set to 0 (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.120: property "use-mobile-connection" set to false (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.120: state initial -> up-to-date (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.120: indicator icon: system-software-update, notification title: "Up to Date", notification body: "The system is up to date." (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.124: setting HTTP proxy to "(null)" (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.125: setting HTTPS proxy to "(null)" (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.125: setting FTP proxy to "(null)" (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.125: setting SOCKS proxy to "(null)" (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.125: setting the list of download IPs which should not go through a proxy to "(null)" (package-update-indicator:1445): package-update-indicator-DEBUG: 13:55:54.125: setting the PAC string to "(null)"
