TYPO3 Core

I have a bug that appears in several of my 4.5.3 Installations.

There is some Text in the RTE which is wrapped by an internal link (inserted via the element browser).
When the editor wants to move this link to another position in the text, or duplicate it, he copies / pastes it.

The link looked like this before being copied/pasted:
<a href="http://example.ch/?id=27#39&quot; class="internal-link">lorem</a>

And like this after the action
<a href="http://example.ch/../?id=27#39&quot; class="internal-link">lorem</a>

RealURL corrects that somehow, so the page links still work, but the jump to the anchor stays broken.

This ocurred with Firefox 4 on win and Firefox 5 on Mac.
I tested with IE 9, where this wouldn't occur.

I disabled my personal RTE TSconfig to check if it was provoked by some misconfiguration, but that wouldn't change anything.

Please let me know if you need more testing on other browsers.

Thanks
Urs