This is something that started some days ago (I'm not sure when), but I recently realized it's Opera to blame.
I frequently use Ctrl-Shift-Home and Ctrl-Shift-End to "select everything to the beginning/end", but when Opera is running, this shortcut just does nothing. Despite I'm in another browser, or in Notepad, Word, etc., the shortcut just doesn't work. Using only Ctrl or Shift with Home/End works, but not the three keys at the same time. As soon as I close Opera, everything works as expected.
I checked Opera's shortcuts but none has these key combination. Still if it was there, it should not affect other applications.
Does this happen to anyone else?
I'm using version 63.0.3368.94 (the latest as of today) on Windows 7 Ultimate x64 (fully updated).