HAHA. Maybe we should email them and tell them to quit fricken around with our ads.. I've noticed in the past weeks-months that my ads always have the "ads by Google" thingy placed in different areas. I read in a tip someplace that I should not use the "advertise on this site" in my publishing options. I took the advice and removed it... (off topic sorry)
I haven't seen those on any of my sites yet. They look pretty cool tho. I wonder if you can customize the colors to make it blend in..
I have seen very strange ads on my website,I really hope google will consider not making any foolish changes.
In my experience with ads, it's best that they stand out a little but not a lot. I just hope that this is 'a little'.
It wont lower your CTR is you design your site around the look of the ad Then it will look like part of your site