Blog post image quality issues

Further to  my earlier post about this, I tried two different approaches to the same image. The version immediately below was exported from MS5 at 200dpi PNG, and then cropped and resized in my web editor. the version below that was exported at 150dpi PNG, and is noticeably better quality (though looks slightly pixelated in panel 1). Strange, but I'll use the latter method in future.

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