After paste (using any method to paste: Ctrl+V, Shft+Ins, Right button menu):
CR is inserted before and after pasted text.
I have to edit this bug report due to the fact that my other bug report was actually deleted (redirected to this one): https://answers.sap.com/questions/68104/unable-to-insert-pictures-in-the-comment.html
Another bug is that it's not possible to simply paste an image into the question/answer or comment!
If you paste the image, it will be shown in the question/answer/comment box, but after saving it will disappear!
The only way now is to save image as file locally and upload it using "Insert Image" button. It's a wrong way of doing things! In past it was possible to simply use <ctrl>-<c> to paste the screenshot image without temporary file!