Fuzzy Patch on Birds $20 - Fake?

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  I bought around 10 bucks worth of food at my school cafeteria. Since I didn't have any other paper money on hand, I paid it with a fifty. I got a Birds $20 and a bunch of other paper money and coins. I would usually check my change, but I was in a hurry so I just quickly shoved the money back into my pocket.
  It was until I got home that I noticed that the $20 was bigger than a Birds $10. The Optical Security Device was "fuzzy" but changed from gold to green when held at a 45 degree angle (normal). It was similar to the bill in my recent post here:

http://www.cdnpapermoney.com/forum/index.php?topic=4741.0

I currently only have this Birds $20 in possession, but I'll be visiting the bank in Edmonton in a few days, and will request a Birds $20.
  My question is: Is this counterfeit?

Here is a picture. It is not that clear, but it might help:

http://img80.imageshack.us/img80/7089/fuzzypatchon20dollarstd4.png

Regarding the OSD, many of them are fuzzy right from the printing. The note looks ok to me, but I've only encountered one fake ever:  a journey $10-non holostrip, and what gave it away was the paper felt wrong, too heavy, didn't bent right. 

Regarding the OSD, many of them are fuzzy right from the printing. The note looks ok to me, but I've only encountered one fake ever:  a journey $10-non holostrip, and what gave it away was the paper felt wrong, too heavy, didn't bent right. 

You're right. It is genuine. The bank teller said I can deposit it if I wish. I'm keeping it, since the Birds $20 are gradually disappearing.

Also, the older bills without the holographic stripe are easy to counterfeit. Someone else in the forum had a fake similar to yours.

Edit: Checked with UV checker. Planchetts glow. GEUNINE