Tijm,
It looks like the temporary content is not being cleared when modifying the HTML Popup XSL template.
I add a Point a layer, the default popup looks like this.
I decided to modify it so that the photo would show the picture, instead of the URL hyperlink.
In layer properties - html popup I modified the section of the XSL, for when a field value startes with "https:"
Changing it to show an image instead...
I clicked OK
Clicked on my feature to see the popup.
whoops ... forgot to close the "img"
Back in Layer Properties make the correction.
OK.. and Click the feature again.
hmm... same error.. what ??
The property seems to be stuck with my first XSL modification attempt. I found that if I copy the layer in the TOC, and Paste it back in, If I click on the Feature from the pasted layer, I see the modification.
Craig Williams
Copy and paste seems to be a decent workaround for this issue.
The layer package for content used in this explanation is located at http://www.arcgis.com/home/item.html?id=5cb6af18edfb415499707d368c7388fc
Mark