I think I solved all the bugs you brought up for the <600px viewport width, check em out.

The expando thing is a separate issue, I'll come back to that another time.

The comment input width thing is like my moby dick white whale.... it's getting ridiculous. Your javascript hunch looks correct. I know we can just take out the width definition entirely, and it would work great in my tests. But the code says not to do that in the comments, but maybe that's obsolete....

Option 1:

var body_width = Math.max(body.children(".md").width(), 500);

Change this line to simply

var body_width = body.children(".md").width();

This should remove that 495px restriction?

OPTION 2:

Delete one of the following lines to remove the width restriction entirely (best option):

//restore original (?) css width/height. I can't explain why, but //this is important.

textarea.css('width', '');

Delete these lines and/or also delete these 3 lines:

var new_width = Math.max(body_width - 5, textarea.width());

textarea.width(new_width);

edit.width(new_width);

What do you think? Can you test out option 2 for me real quick before I try it on the production server?