I don't think "blur" was ever anything to do with the 29/59 bug. That bug is normally a stuttering caused by a rapidly-changing frame rate sent by the broadcaster.
Blur sometimes just means you are being sent a standard-definition picture rather than a high-definition picture. Maybe you are watching episodes created before they switched to high-definition?
I watch on my HTPC and no blur is noticed... The content is definitely 1080 content. 411info shows 1920x1080 (59.9401) The blur seems to actually be the Echo not erasing the old frames from the screen quick enough so when an animation moves just a little bit or their mouths move you don't see the edges clearly.. Imagine Frame1, Frame2 and Frame3, if the video is currently displaying frame 3, you still see shadows of frame 1 and 2 thereby making the portion of the screen that changed between frame 1-3 appear to be a blur. This is extremely worse during a screen pan, because at that point everything is moving and you start to see about 2 of every edge at the same time.
The latest update had this problem on top of the interlacing problem so its significantly better since the recent beta update but now its just left with the blur.