I have confirmed with two different phones that if you visit a very simple Bootstrap site with the stock Android Froyo web browser, a box (of the kind that tends to represent "invalid character") appears whenever the source HTML has a line break in a paragraph.

I'm not talking about an HTML line break like <br>, I mean that when you put a line break in the .html file, it shows up as a box instead of a space on the web page.

This occurs on the Bootstrap-using web page at http://lumino.so. A minimal case that reproduces it is at http://lumino.so/bug.html.