Whenever I wanted to draw a line I'd normally click on two locations and a line would appear between the two. If I do so now, either the line doesn't appear or it's not rendered for me. If I click a third time on a third location a line appears going through the first two clicks and ending at the third click. I've also had some strange issues with the ping tool (it drew a filled square instead of a circle with transparent center), but that seems to have sorted itself out by now. I've also had an issue with token bars- specifically the green/blue token over each token's head. The bar is shown consistently as empty, even when it should be full. I've only run into this bug today. I'm using Google Chrome, 27.0.1453.94 m. Edit: Hm. Logging into the same slides in Firefox does not replicate the problem. Looking at firefox I can see that Chrome for whatever reason decided not to display some of the lines already drawn on the map. When I redrew those lines in Chrome, I actually created double line layers. Restarting Chrome seems to have fixed the issue for now.