Can't place tokens on tabletop

I searched for a specific token, one that's included with Roll20, tried to drag it onto my map, and it won't do anything. Tried some other objects and tried other campaigns and they won't add stuff either. Edit: I'm allowed to interact with objects that were already there, I just can't add anything new. Chrome version 22, Windows 7, etc etc. Edit 12.16AM: Issue has resolved itself. Mods, lock/delete this thread if you want.

Occasionally I have run into a similar bug. I drag a token to the map and it does not appear. Later on after a browser refresh or reload I find a number of tokens that I tried to add earlier are there. - Gauss

I'm finding that recently, the only way to add anything to the map is to have the grid turned on. If I shut the grid off, nothing I drag onto the map shows up.

Tested in multiple campaigns in Chrome and Firefox.

Thanks Riley.