UBB 7.6.0
This is about embedded YouTube videos.
Currently, YouTube videos that are 16x9 when viewed elsewhere are reduced to 4x3 when embedded in a UBB post (the 16x9 format is shown with a box that is 4x3). Also, when you are playing the video you cannot click to view full screen.
Not a huge issue, since you can click in the video to open it on a separate tab. But it would nice if UBB could support it.
PS: I upgraded to 7.6.0 a few day after it was released. We've had no issues.