how can I remove the black border from menu view? It was appears in the latest version 45.0.2552.635
See the pic of the trouble: http://imgur.com/FQshBi9
See threads about compositing.
opera://flags/ => Override software rendering list (enable it).
Other method: opera://settings/ => Browser => System => disable "Use hardware acceleration when available".
None of these worked for me (opera 45 stable on debian testing x64).