It seems to be pretty jarring to me atleast when I hover over or click on buttons in the seven theme.
I think there needs to be some middle ground for when the buttons are being hovered over in order to make the transition seem smoother.
PASSED: [[SimpleTest]]: [MySQL] 41,087 pass(es).
FAILED: [[SimpleTest]]: [MySQL] Unable to apply patch seven-buttons-hover-846182-52.patch. Unable to apply patch. See the log in the details link for more information.
FAILED: [[SimpleTest]]: [MySQL] Unable to apply patch seven-buttons-hover-846182-47.patch. Unable to apply patch. See the log in the details link for more information.