I absolutely love this beta feature - but I ran into an odd (though fixable) bug with it today that I wanted to let you know about.
I was collaborating in realtime with a colleague who uses a Mac, while I was using a PC. We both used the tool to create sets of sticky notes from photos.
When I tried to rearrange the notes my colleague had created, though, my system treated each note as two separate items: a sticky note with an image on top of it. I could move each piece separately, but I couldn't move them together without selecting both.
My colleague didn't have the same problem with the notes I had created - both of us could select text and note as a single object with one click, and move them around together.
Fortunately, it seems that exiting and then reloading the board fixed the issue.
This issue might work both ways - I don't think my colleague reloaded the board after I created my notes, but I'm not 100% sure.