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Using IE11 on Windows7, when you view the weekly calendar, the weather icons (sun, clouds, etc.) are not inside the box for the appropriate day. They get pushed out to the next day and for Saturday, they are off the grid entirely. Looks fine in Chrome.
Also, I should mention that in both IE and Chrome, the vertical gridlines for the top row (day of week) do not line up with the vertical gridlines for the rest of the rows (time of day). They are off slightly.