I am using four simple Trello.get calls that until today, would work and display content in IE 5-9 without issues (compatibility mode). I am aware that Trello states only IE10+ is supported, but I had no issues until today. Is anyone aware of any changes made that caused this to happen?
Today they've released their first Power Ups in the mobile apps, maybe they had to make some changes that causes the integrations to stop working in IE9 or below. (See the Trello Blog for more info)
As you've already figured out, Trello only officially supports IE10 and up so they've probably never tested their changes in IE9 and will probably not fix bugs in IE9 or below.
Hope this clears something out.
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