I have a site and since updating to 4.5 it has a very subtle display bug that seems jQuery related (full bleed images have a white border that snaps away into correctness when you resize window).
The theme hasn't been updated since 2014.
The only lead we have is this in the console:
JQMIGRATE: Migrate is installed, version 1.4.0
My understanding is that this indicates some of the jQuery in the plugins or theme is using old API's and this adds compatibility.
How can I figure out the code that's causing it?
I suspect that the display problem is related, and even if it isn't I figure I should start there either way.
Thanks for any help!