I have come across a few glitches in the destiny beta.
The first was in a small building in the tank area of the cosmodrome.
There are some bookcase style things next to wall. You can jump over them and into the gap between them and the wall... But you can't jump out
Also, around the same area, in the first story mission if you die just after grabbing the first rifle, you can spawn behind some bars that now cover the way you entered the room. You then after restart the mission.
[spoiler]I died trying to jump to the platforms in the centre[/spoiler]
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I was standing directly under the sewer pipe where Riksis, Devil Archon spawns from, he immediately punched me through the wall where I fell through the world to my death. :)