HI, at this time I'm not able to test the project on a real IE8
however you can...
1: in your resources a png file is rename as JPG, make sure to check all extensions
agoda_txt_en.jpg would be agoda_txt_en.png
2: use this versions (optimized) without blank space around the graphic.
BTW: you must update size and position of this file
3: Check all browser warnings ..and send this image to your customer
4: Avoid overlapping of elementws with PNG in the project ( graphics and buttons) and try again
BTW: try this simulator https://netrenderer.com