[TYPO3-english] upgrade from 3.8.1 to 4.2.12 - experiences to share and some questions

[Eliott]

Hi everyone!

Following the recommendations of the group, after upgrading our server, 
we are just about to go live with the upgrade of our typo3 instance.

Although we had many extensions and many sites on the same typo3 from a 
technical perspective everything went fine. We followed the 
3.8.1->4.0->4.1-4.2 route and only encountered problems with the 
presentation.
This might be obvious to those doing regular typo3 development, 
nevertheless, we were surprised to see that css_styled_content changed 
over the years and many parts of the website weren't looking exactly as 
expected. To fix this was the most time consuming part of the upgrade, 
yet this took no more than a day.

There is one thing that I was surprised to see. I am not sure if it's a 
bug or just a configuration issue, so I'd like to here the suggestions 
of the community.

We were using Text / image content type extensively where the image was 
a pdf document, set as a link. On the front end you could see the 
thumnbail and the picture was clickable and leading to the pdf document 
itself.

With 4.2 this does not work at all. This is what I get from the source:
<div class="csc-textpic-imagewrap"><dl class="csc-textpic-image 
csc-textpic-firstcol csc-textpic-lastcol" style="width:0px;"><dt><img 
src="" width="" height="" border="0" alt="" /></dt></dl></div>

The strange thing is that Imagemagick works fine, because the thumbnail 
for the pdf is ok in the backend.

any ideas?
regards
eliott