Hi Dave
I think that the problem is linked to the user of the Zoomin storyview. When zoomin view is enabled, there is an additional CSS rule in force:
.tc-storyview-zoomin-tiddler {
position: absolute;
display: block;
width: 100%;
width: calc(100% - 84px);
}
That calculated width is to fix the long standing problem we had with tiddler widths in zoomin view. It is also giving you 84px of padding on the right.
So I think you'll want to create an override like this:
.tc-storyview-zoomin-tiddler {
width: 100%;
}
}
Let me know how you get on - I'll put the fix in 5.1.8 if it is working for you,
Best wishes
Jeremy.