In a previous post I asked about a strange appearance of notify-osd, then I fixed it.
But now I have a new question.
I have about 20 machines installed from scratch (actually all of them have been cloned from the first one), on every machine I installed notify-osd and it works, but is weird that on some machines the notification bubble has black background, white text and if I send various notification I can see only one of them; on other machines the notification bubble has white background, black text and if I send various notification I can see all of them.
I have installed notify-osd and no other packages, I've made no changes in dconf.
How can I change these behaviour in order to have all the same on all machines? (black background, white text and to see all the notification at the same time)