What would v21 have to do with the forums?
If you had adblock and tried to block a forum avatar but accidentally clicked all of forum.blockland.us that could be it. Because that's pretty much how the forum looks without any images.
Get chrome
This was it. I disabled adblock on forum.blockland.us and everything went back to normal. The weird part is I don't remember ever trying to block anything...
The forums have gone white to you huh? Better get some black people in da hood then.