Shows:
1 notice X
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When hovering over the [X], the text "1 notice" and "Warning: .. " go down 1px and then back up again.
Not sure what it causing it, could be a browser rendering bug.
Version: unspecified
Severity: minor
Widening scope, the "back" button of the inspector context is affected as well.
Screen capture of "Toolbar notice close button"
: http://cl.ly/2O3c2F072a02
Screen capture of "Inspector context back button"
: http://cl.ly/2S3g0V0y2O1J
Cause of the wiggling seems to be a transition on the opacity. Going to work around this by just commenting out that transition, because it's such a minor detail.
I'll also try to isolate a test case and file a bug upstream with Chrome.
Change 121279 had a related patch set uploaded by Catrope:
Don't use transitions for opacity on hover for now
Change 121279 merged by jenkins-bot:
Don't use transitions for opacity on hover for now