TYPO3 Core

Seems that the custom attribute does not follow...

In what browser(s)?

The bug is in Firefox 3.6
I tested also Internet Explorer 8 - here it works fine. There is no bug.

I can't reproduce this issue. Please explain exactly the steps to reproduce.

I tested it with TYPO3 4.4.7 an 4.5.2:
1) Make sure that the Typoscript Template "ClickEnlarge" is included
2) Insert a new Content Element "Regular Text Element" or any other with an RTE Field.
3) Insert an Image (JPG in my Case) - new Magick Image
4) right Click on the Image -> Modify Image -> Click enlarge -> Update
5) Save and preview -> The Image on the Frontend is clickable
6) return to the Backend and insert some Text after The Image
7) Move the Image with drag and drop somewhere into the Text
8) Save and preview -> The Image on the Frontend is NO MORE clickable
9) Look at the Backend and look at: right Click on the Image -> Modify Image
10) Click enlarge is still enabled. But it dont works.

I think this is due to the same Firefox issue as #28497.

Please check what the src attribute of the img tag looks like just after the move. Is the url relative?