It seems that in Chrome, there is a crash when the game initially loads. It asks to refresh but the same error message turns up. Using Firefox now to play but not preferable.
I started playing last night - so far have spent over 10 hours of "real time" in the game - all of it using Chrome on Windows 7. No problems so far that are platform related.
Using Chrome for Mac without much trouble. I did get this bug:
when I'm first born I have the thought bubble to move around with arrow keys, I can't move until I first use the mouse to point somewhere. After that I can move with arrow keys.
Using Chrome & Firefox on Mac. Chrome will "OMG!" 2x more than on Firefox, although the game scrolls better on Chrome (although I'm not sure if that is a browser or lag issue).
First time I'd ever seen this: i.imgur.com/yssTx.png come up on my screen. It happened to my friend (who was playing next to me on her W7 laptop, using Chrome) too, though not at the same time.