Earlier this month, Flickr announced a new type of embed code:
“Hi, I’m Chris, an engineer here at Flickr.
Today we’re excited to start rolling out a new version of our HTML embed code, with more visible attribution of the photo owner and enhanced features.
This new code brings the features of the “iframe” web embeds and the compatibility of standard HTML image embeds together into a single code.
The way we’re accomplishing this is through “progressive enhancement.” This means that at the core of the new embed, we start with the same HTML image tag that has always been on Flickr, and if supported, we load the more sophisticated, enhanced embed. If the “fancy” embed isn’t supported or something goes wrong, the standard image will still load….” Click here to read the rest of the message: https://www.flickr.com/help/forum/en-us/72157655480853916/
The problem with the embed code is that it adds the official Flickr logo around your photos along with a caption, thus ruining the photos itself! An example is from the same official Flickr post as mentioned above:

So how do you get around this problem? Second Life blogger, Ciaran Laval has a great tutorial on how to avoid this, which you can read here:
How To Fix Flickr’s Embedding Mess (Whilst We Await Flickr Providing A Solution)