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after todays upgrade mouse closes current doc (tab)

today's upgrade severely damaged my system. After it, the mouse became behaving randomly. Sometimes the left click opens a right click menu, sometimes it issues double-click, very often it closes the current document (tab, not a whole app). Noticed for all browsers, konsole, skype

uname -a
Linux iv-desktop 3.16.0-4-amd64 #1 SMP Debian 3.16.39-1+deb8u2 (2017-03-07) x86_64 GNU/Linux

lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 8.7 (jessie)
Release:        8.7
Codename:       jessie