I don't know if this has been reported on the github or here on the forums, but I couldn't find my issue in either place.
On Sigil 1.2.0 I often use the preview window to check if I've made an error (XHTML has a stricter syntax than regular HTML 5), one thing I regularly slip up with is using the proper case for images and style sheets. For example:
I have the following files:
- Styles/style.css
- Images.image.png
If I then use the following tag in my header...
Code:
<link rel="stylesheet" type="text/css" href="../styles/style.css" />
And this code in my tag...
Code:
<img src="../Images/Image.png" class="img"/>
Everything looks fine if I preview it in Sigil. However on Adobe Digital Editions and my Kobo Clara HD I don't see any image and the CSS is not applied. I've added an example epub so you can see it in action.