igor@antiX1:~
$ sudo synaptic
[sudo] password for igor:
Sorry, try again.
[sudo] password for igor:
sh: 1: lsb_release: not found

(synaptic:22556): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:85:17: Not using units is deprecated. Assuming 'px'.

(synaptic:22556): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:197:17: Not using units is deprecated. Assuming 'px'.

(synaptic:22556): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:233:17: Not using units is deprecated. Assuming 'px'.

(synaptic:22556): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:280:17: Not using units is deprecated. Assuming 'px'.
...
...
...
(synaptic:22556): Gtk-WARNING **: Theme parsing error: epiphany.css:149:17: Not using units is deprecated. Assuming 'px'.
sh: 1: lsb_release: not found

(synaptic:22556): Gtk-WARNING **: Style property"border-top-left-radius" is not gettable

(synaptic:22556): GLib-GObject-WARNING **: /build/glib2.0-sgtaSC/glib2.0-2.36.3/./gobject/gtype.c:4239: type id `0' is invalid

(synaptic:22556): GLib-GObject-WARNING **: can't peek value table for type `<invalid>' which is not currently referenced
igor@antiX1:~
$

Try using"su" instead of"sudo". Hopefully you will have different results.

Eino wrote:Try using"su" instead of"sudo". Hopefully you will have different results.

Synaptic's behavior is the same regardless if I use"su" or"su -c synaptic" __{{emoticon}}__

this is the same error as the other thread.... the only difference is you are running an application with root priveleges and thus using root's gtk config. if changing the theme has worked for you in the other post, it seems you will need to change the theme as root. Therefor login as root and run lxappearance and choose the theme that your user account is using.

Dave wrote:this is the same error as the other thread.... the only difference is you are running an application with root priveleges and thus using root's gtk config. if changing the theme has worked for you in the other post, it seems you will need to change the theme as root. Therefor login as root and run lxappearance and choose the theme that your user account is using.

Thanks Dave, You were right again!

The question is what will happen in the future when I again do apt-get upgrade or apt-get dist-upgrade?!

Every AntiX, started from 8.5 to 11 was realy great! The 12th and now 13th release are really great challenge and problem for me...