On google right now, but it has happened long time ago on some other websites als, well, I can't be sure i remember right but i think this was yahoo in the past. . I don't want to say happens randomly because I'm sure there is a reason this happens, but i don't have more info what is this reason. But don't happen very often.
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PS. Isn't it possible to implement its own scaling options in zenno? I mean i would like my rest of PC to have 125% scaling, but i want zenno to stay at 100% scaling, as Project maker require lot more info to see on screen, but for the rest of PC i don't need all that small.
Maybe this would also solve all those problems. For example Mozilla Thunderbird has such option where i can scale it independently from my system.