Okay, I found out a little bit more regarding this problem. Take this webpage for example:

http://www.heise.de/newsticker/meldung/Vor-80-Jahren-Start-des-oeffentlichen-Fernschreibwesens-in-Deutschland-1979886.html

Here you find the following line:

<img src="/imgs/18/1/0/9/3/4/1/3/Fernschreibmaschine_mit_Telefonanschluss-bcd58419497aac2f.jpeg" width="250" height="170" alt="" data-zoom-src="/imgs/18/1/0/9/3/4/1/3/Fernschreibmaschine_mit_Telefonanschluss-1ef1f7a29d9f5a52.jpeg" />

This line is then transformed by selfoss into the following:

<img ref='/imgs/18/1/0/9/3/4/1/3/Fernschreibmaschine_mit_Telefonanschluss-bcd58419497aac2f.jpeg' alt="" />

Since it says "<img ref='/..." this is not matched by the regex which puts the "http://www.heise.de/" upfront. I also wonder why an "<img src=" is transformed to an "<img ref=".

Tobi, could you please help?

Many thanks,
Michael.