TYPO3 Core

Are you sure your css markup is valid?
The validator complains at several places...

http://jigsaw.w3.org/css-validator/validator?uri=http%3A%2F%2Fdevp.dslr-seite.de%2Findex.php%3Fid%3D28&profile=css21&usermedium=all&warning=1&lang=de

Btw: I don't think the two websites you posted can be compared that easily, because they don't use the same document (tags, styling...).

Ok, thank you for your answer. I found the problem. I use some own html markups in my projects, an i copy this code always in my projects. I think there is an bug in the t3editor. in older t3 versions copy and paste are always successful, but in this version i became the following code: (take a look at div class="scs-textpic...", there are some whitespaces gone...)

tt_content.image.20.layout.17.value =<div class="csc-textpiccsc-textpic-intext-right###CLASSES###">###IMAGES######TEXT###<divclass="csc-textpic-clear"></div></div>
tt_content.image.20.layout.18.value =<div class="csc-textpiccsc-textpic-intext-left###CLASSES###">###IMAGES######TEXT###<divclass="csc-textpic-clear"></div></div>
tt_content.image.20.layout.25.value =<div class="csc-textpiccsc-textpic-intext-right-nowrap###CLASSES###">###IMAGES###<divstyle="margin-right:{register:rowWidthPlusTextMargin}px;">###TEXT###</div><divclass="csc-textpic-clear"></div></div><divclass="csc-textpic-clear"></div>
tt_content.image.20.layout.26.value =<div class="csc-textpiccsc-textpic-intext-left-nowrap###CLASSES###">###IMAGES###<divstyle="margin-left:{register:rowWidthPlusTextMargin}px;">###TEXT###</div><divclass="csc-textpic-clear"></div></div><divclass="csc-textpic-clear"></div>

Good to know that you could figure the problem out!

Since it seems to be something that does not need to be changed in TYPO3, I'm closing this issue again.