Same here, and I wasn't aware it was Google Chrome only.
I tried downgrading, but the same happens with 1.6.1.
When I reload Feng, I am able to edit the file once. After saving and going back to edit this bug shows up. So a "fresh load" makes it able to edit the file.
Really annoying, because it means we can't use Chrome with Feng! And Chrome is pretty fast with Feng, so that kinda sucks.
Anyone has an idea on how to fix this?