[slowsmile]

@Hitch...And if you want my honest opinion, I have never really trusted the text or image displays from the older KP app. But I do trust these displays in the KP3 app. Reasons? The old KP app hasn't been updated in a donkey's age whereas the newer KP3 app has already been updated 6 or 7 times this year. So KP3 is the more reliable app because it is being properly maintained with regular updates whereas the older KP app has not been properly maintained because updates are rare.

Now over to the KP3 displays that I trust. If you click on each of my KP3 images above in turn(or download them for proper image display)-- first the Tablet-KF8-KP3.jpg and then the KindleReader-eInk-KP3.jpg -- then enlarge and compare them you will also note that the image sizes of both versions is exactly the same. And since, in this test, both screen widths and both image widths are the same size -- the screen width does not change for each test on KP3 -- then I would really expect the two image displays to be the exactly same size which was the case in my testing. Which must also ultimately prove that this styling(inline styling using % dimensions) works just fine on both KF7 and KF8 devices. If the styling wasn't functioning correctly in the KF7 version then the KF7/KF8 image displays would not be the same size. Right? But they are the same size...

It's also plain to see that you only tested the epub on the old KP app. And you obviously haven't yet tested that epub on the newer KP3 app. I've now shown you that the KF8 and KF7 displays on the KP3 app are the same size(because both screen widths and both images are exactly the same size) on my tests which was the expected result. This directly conflicts with your own test results on the old KP app(which I have never really trusted).

You could of course actually try loading the mobi version of the test epub into your old eInk device and have a look. But, unfortunately, there is no way that I can see how you could accurately measure the image width(ie by measuring the larger but invisible white canvass background) on your device accurately. Over to you.