In MarsEdit 4.0.8 I made a change for Blogger blogs to help ensure that images are embedded in a way that is compatible with Blogger’s themes. In the process, I messed up the generation of image URLs such that the http or https prefix for an uploaded image only has one slash:
When it should have two:
The result was that for some blogs at least the images are showing up as missing resources, and not loading into the final published page.
MarsEdit 4.0.9 fixes this, but if you have any posts from the past month or so that exhibit this problem, you can fix it by editing the post as plain text (Post -> Edit Plain Text), find the “https:/” and add a slash to make it “https://”.
This update also changes the generation of “<!–more–>” tags on Blogger to avoid wrapping them with “<br />” tags.