Disordered sidebar in admin panel of self-hosted blog network

This is how my self-hosted blog network's sidebar started to look, starting from yesterday:

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Can someone tell me, what is going on or what am I missing?

Tested on Chrome on two different computers after completely purging cache and cookies. Zoom in browser is 100% (switched off). It happens in every blog that belongs to my blog network, including blog network dashboard.

It started to happen yesterday, event though there was no update to my Wordpress, neither manual nor automatic. I have the newest publicly available, stable version of Wordpress behind my network (4.3).

This isn't very annoying, though makes my life a little bit more miserable! :> However, I'd like to know, if this is a know bug or issue, that happens on other computers or if this is limited to my computers only?

Answers 1

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