TYPO3 Core

We encountered the following problem with the RTE after the last security updates to TYPO3 (4.4.5, 4.3.9). But maybe this error existed before, not sure.

Steps to reproduce:
- Create a new content element of type text
- Type the Word "Lorem", hit enter, type the word "ipsum" (result as expected: two paragraphs with one word in it are created)
- Now select the second (!) word and link it to e.g. "www.ipsum.ch" and save the content element (result as expected after linking and saving: the word "ipsum" is linked)
- Select the upper word ("Lorem") and link it to e.g. "www.lorem.ch" and confim in the linking dialog

Expected behaviour: The word "Lorem" is linked and the link on the word "ipsum" is untouched

Seen Behaviour:
The word "Lorem" is staying as is, without any link. But instead, the word "ipsum" get's the link to "www.lorem.ch" attached

This seems to be a Javascript issue, since no saving is needed in the last step to reproduce the issue.

This could be reproduced on a 4.4.6 and a 4.3.10 installation of TYPO3 in IE8 - it works fine in Firefox. No Javascript errors seen in IE8.
(issue imported from #M16907)