So this was an interesting one for me. I'm on Windows 7 x64 using Chrome 49.0.2623.110 m. I'm going to see if I can reproduce this in the most recent version in a sec (for some reason it never auto-updated so it's a little out of date at the moment.) Anyway, the bug: I'm editing a handout. I have a list of things as a bulleted list. I select the items in the list and try to format them as a numbered list. Whole tab crashes instantly. Can't navigate to another page, can't reload the page, anything. I have to make a new tab and revisit Roll20.net.